‘Umar b. al-Khattab said: One day when we were with God's messenger, a man with very white clothing and very black hair came up to us. No mark of travel was visible on him, and none of us recognised him. Sitting down beside the Prophet, leaning his knees against his, and placing his hands on his thighs, he said, “Tell me, Muhammad, about Islam." He replied, “Islam means that you should testify that there is no god but God and that Muhammad is God’s messenger, that you should observe the prayer, pay the zakat, fast during Ramadan, and make the pilgrimage to the House if you have the means to go." He said, “You have spoken the truth." We were surprised at his questioning him and then declaring that he spoke the truth. He said, “Now tell me about faith.” He replied, “It means that you should believe in God, His angels, His books, His apostles, and the last day, and that you should believe in the decreeing both of good and evil." Remarking that he had spoken the truth, he then said, “Now tell me about doing good." He replied, “It means that you should worship God as though you saw Him, for He sees you though you do not see Him." He said, “Now tell me about the Hour." He replied, “The one who is asked about it is no better informed than the one who is asking." He said, “Then tell me about its signs." He replied, “That a maid-servant should beget her mistress, and that you should see barefooted, naked, poor men and shepherds exalting themselves in buildings." [‘Umar] said: He then went away, and after I had waited for a long time said to me, “Do you know who the questioner was, ‘Umar?" I replied, “God and His messenger know best." He said, “He was Gabriel who came to you to teach you your religion." Muslim transmitted it.

‘Abdallah b. ‘Amr reported God's messenger as saying, “The Muslim is he from whose tongue and hand the Muslims are safe, and the Emigrant is he who abandons what God has prohibited.” This is Bukhari’s wording. Muslim has: A man asked the Prophet, “Which of the Muslims is best?” He replied, “He from whose tongue and hand the Muslims are safe.”.

Al-‘Abbas b. ‘Abd al-Muttalib reported God’s messenger as saying, “He who is well-pleased with God as Lord, with Islam as religion, and with Muhammad as messenger will experience the savour of faith,” Muslim transmitted it.

Abu Huraira reported God’s messenger as saying, "By Him in whose hand Muhammad’s soul is, anyone of this people, Jew or Christian, who hears of me and then dies without believing in my message, will be among those who go to hell.” Muslim transmitted it.

Anas reported God’s messenger as saying, "If anyone observes our form of prayer, faces our qibla, and eats what we kill, that one is a Muslim who has protection from God and His messenger; so do not betray God’s protection.” Bukhari transmitted it.

Abu Umama reported that God’s messenger said, “If anyone loves for God’s sake, hates for God’s sake, gives for God’s sake and withholds for God's sake, he will have perfected faith.” Abu Dawud transmitted it; and Tirmidhi transmitted it from Mu'adh b. Anas with a transposition of phrases, including “he will have perfected his faith.”

Abu Dharr reported God’s messenger as saying, “The most excellent action is love for God’s sake and hatred for God’s sake.” Abu Dawud transmitted it.

Abu Huraira reported that God’s messenger said, “The Muslim is he from whose tongue and hand the Muslims are safe; and the believer is he whom men trust with their lives and their property.” 'Tirmidhi and Nasa’i transmitted it; and Baihaqi added in Shu'ab al-iman by the transmission of Fadala, “And the mujahid is he who strives with himself regarding obedience to God, and the muhajir is he who abandons transgressions and sins.

Anas said: God’s messenger seldom addressed us without saying, “He who is not trustworthy has no faith, and he who does not keep his covenant has no religion." Baihaqi transmitted it in Shu'ab al-lman.

‘Ubada b. as-Samit said: I heard God's messenger say, “If anyone testifies that there is no god but God and that Muhammad is God's messenger, God will keep him from going to hell." Muslim transmitted it.

‘Uthman b. ‘Affan reported God's messenger as saying, “Whoever dies knowing that there is no god but God will enter paradise." Muslim transmitted it.

Mu'adh b. Jabal reported that God’s messenger said to him, “The keys of paradise are the testimony that there is no god but God.” Ahmad transmitted it.

‘Uthman said that when the Prophet (ﷺ) died some of his companions were so grieved that they almost began to harbour doubts. Remarking that he was one of them, ‘Uthman said: While I was sitting ‘Umar passed me and gave me a salutation, but I did not notice it. ‘Umar complained to Abu Bakr, and the two of them came forward and gave me a salutation; then Abu Bakr asked, “What induced you to refrain from returning the salutation of your brother ‘Umar?” I replied, “I did no such thing.” ‘Umar retorted, “Yes, I swear by God, you did.” I said, “I swear by God that I did not notice you passing me or giving me a salutation.” Abu Bakr then said, “‘Uthman is speaking the truth. Something must have distracted you.” On my replying that it had, he asked me what it was, and I said, “God has taken His Prophet before we asked him wherein this affair provides salvation.” Abu Bakr said that he had asked him about that, so I rose and went to him and said to him, “You for whom I would give my father and mother as ransom are most worthy of it.” Abu Bakr then told me that he had asked, “Messenger of God, wherein does this affair provide salvation?” to which God’s messenger replied, “If anyone accepts from me the confession which I proposed to my paternal uncle1 and he rejected, it will be salvation for him.” Ahmad transmitted it. 1 Abu Talib, the uncle who gave protection in Makkah, but did not accept his religion.

Miqdad reported that he heard God’s messenger say, “There will not remain on the face of the earth a mud-brick house or a camel’s hair tent which God will not cause the confession of Islam to enter bringing both mighty honour and abject abasement. God will either honour the occupants and put them among its adherents, or will humiliate them and they will be subject to it.” Miqdad said, “God will then receive complete obedience.” Ahmad transmitted it.

Wahb b. Munabbih, on being asked whether ‘There is no god but God’ was not the key of paradise, said, “Yes, but every key has wards. If you bring a key with wards the door will be opened for you, otherwise I it will not.” Bukhari transmitted it in a chapter heading.

Abu Umama reported that a man asked God’s messenger what faith was, to which he replied, “When your good deed pleases you and your evil deed grieves you, you are a believer.” He then asked what sin was and received the reply, “When you have a besetting sin, give it up.” Ahmad transmitted it.

Mu‘adh b. Jabal said that he heard God’s messenger say, “He who meets his Lord having associated nothing with Him, observed the five times of prayer, and fasted during Ramadan will be forgiven.” Mu'adh asked whether he should not give them the good news, but was told to let them go on doing works. Ahmad transmitted it.

He also said that he asked the Prophet (ﷺ) what was the most excellent aspect of faith, and received the reply, “That you should love for God’s sake, hate for God’s sake, and employ your tongue in making mention of God.” “What more, messenger of God?” he asked and was told, “That you should like other people to have what you like yourself, and dislike that they should have what you dislike yourself.” Ahmad transmitted it.

Abu Huraira reported God's messenger as saying, “There are three signs of a hypocrite.” Muslim added, “Even if he fasts, prays, and asserts that he is a Muslim.” Thereafter both Bukhari and Muslim said, “When he speaks he lies, when he makes a promise he breaks it, and when he is trusted he betrays his trust.”

Ibn ‘Umar reported God's messenger as saying, “The hypocrite is like a ewe which goes to and fro between two flocks, turning at one time to the one and at another time to the other.” Muslim transmitted it.