Abu Hurairah (May Allah be pleased with him) said: The Prophet (ﷺ) said, "The bell is one of the musical instruments of Satan." .

Ibn 'Umar (May Allah be pleased with them) said: The Messenger of Allah (ﷺ) prohibited riding a camel which eats dung, or animal or human waste. .

Anas bin Malik (May Allah be pleased with him) said: The Messenger of Allah (ﷺ) said, "Spitting in the mosque is a sin, and its expiation is that the spittle should be buried in earth." .

'Aishah (May Allah be pleased with her) said: The Messenger of Allah (ﷺ) saw spittle or snot or sputum, sticking to the wall towards Qiblah and scratched it off. .

Anas (May Allah be pleased with him) said: The Messenger of Allah (ﷺ) said, "It is not proper to use the mosque for urinating or easing oneself. They are merely built for the remembrance of Allah and the recitation of the Qur'an", or as he stated. .

Abu Hurairah (May Allah be pleased with him) said: The Messenger of Allah (ﷺ) said, "If anyone hears a man inquiring in the mosque about something he has lost, he should say: 'La raddaha Allahu 'alaika (May Allah not restore it to you),' for mosques are not built for this purpose."

Abu Hurairah (May Allah be pleased with him) said: The Messenger of Allah (ﷺ) said, "When you see someone buying or selling in the mosque, say to him: 'La arbaha-Allahu tijarataka (May Allah not make your bargain profitable)!' When you see someone announcing something lost in it, say: 'May Allah not restore it to you!"' .

Buraidah (May Allah be pleased with him) said: A man announced (the loss of his camel) in the mosque, uttering these words: "Has any one seen my red camel?" Upon this the Messenger of Allah (ﷺ) said, "May it not be restored to you! The mosques are built for what they are meant to be (i.e., prayer, remembrance of Allah, acquiring knowledge, etc.)." .

'Amr bin Shu'aib on the authority of his grandfather (May Allah be pleased with him) said: The Messenger of Allah (ﷺ) prohibited (us) from buying and selling in the mosque; (he also prohibited us from) making announcement in it about something lost and from reciting poems in it. .

As-Sa'ib bin Yazid (May Allah be pleased with him) said: While I was in the mosque, someone threw a pebble at me, and when I looked up, I saw that it was 'Umar bin Al-Khattab, who said: "Go and call me these two men." I brought them and 'Umar (May Allah be pleased with him) asked them: "Where are you from?" On their replying that they belonged to At-Taif, he said: "Had you been the inhabitants of Al-Madinah, I would have given you a beating for raising your voices in the mosque of the Messenger of Allah (ﷺ)." .

Ibn 'Umar (May Allah be pleased with them) said: The Prophet (ﷺ) said, "He who has eaten garlic should not come to our mosque." . The narration in Muslim is: "He who has eaten garlic should not come to our mosques."

Anas (May Allah be pleased with him) said: The Prophet (ﷺ) said, "He who has eaten from this plant (i.e., garlic) should not approach us and should not offer Salat (prayer) along with us." .

Jabir (May Allah be pleased with him) said: The Prophet (ﷺ) said, "He who has eaten garlic or onion should keep away from us or our mosques." . The narration in Muslim is: "He who has eaten onion or garlic or leek should not approach our mosque, because the angels are also offended by the strong smells) that offend the children of Adam." .

It has been narrated that 'Umar (May Allah be pleased with him) said in the sermon of Friday prayer: "O you people! You eat garlic and onion. I think the odour of these to be very offensive. I saw that if the Messenger of Allah (ﷺ) happened to find a man with such offensive odour in the mosque, he would order him to be taken out of the mosque and sent to Al-Baqi'. He who wants to eat any of these, should cook them till their odour dies out. .

Mu'adh bin Anas Al-Juhani (May Allah be pleased with him) said: The Prophet (ﷺ) forbade (us) from sitting with our legs drawn up to our belly (Ihtiba') during the Friday Khutbah (religious talk before the prayer). .

Umm Salamah (May Allah be pleased with her) said: The Messenger of Allah (ﷺ) said, "When anyone of you intends to sacrifice the animal and enter in the month of Dhul-Hijjah, he should not get his hair cut or nails pared till he has offered his sacrifice." .

Ibn 'Umar (May Allah be pleased with them) said: The Prophet (ﷺ) said, "Allah has prohibited you from taking an oath by your fathers. He who must take an oath, may do so by swearing in the Name of Allah or he should remain silent." .

'Abdur-Rahman bin Samurah (May Allah be pleased with him) said: The Messenger of Allah (ﷺ) said, "Swear neither by the name of Taghut (i.e., false deities, false leaders, etc.) nor by your fathers." .

Buraidah (May Allah be pleased with him) said: The Messenger of Allah (ﷺ) said, "He who swears by Amanah (trust) is not one of us." .

Buraidah (May Allah be pleased with him) reported: The Messenger of Allah (ﷺ) said, "If anyone swears that in such and such case he will be free from Islam and afterwards he turns out to be a liar, he will be as he has sworn; but if he is speaking the truth, he will not revert safely to Islam." .