It was narrated that 'Umar bin Khattab said: "I heard the Messenger of Allah (ﷺ) say: 'Whoever builds a mosque in which the Name of Allah is mentioned, Allah will build a house for him in Paradise.'"

It was narrated that 'Uthman bin 'Affan said: "I heard the Messenger of Allah (ﷺ) say: 'Whoever builds a mosque for the sake of Allah, Allah will build something similar for him in Paradise.'"

It was narrated from Jabir bin 'Abdullah that: The Messenger of Allah (ﷺ) said: "Whoever builds a mosque for the sake of Allah, like a sparrow's nest for Allah or even smaller, Allah will build for him a house in Paradise."

It was narrated that Ibn 'Abbas said: The Messenger of Allah (ﷺ) said: "I see you building your mosque high after I am gone, just as the Jews built their synagogues high and the Christians built their churches high."

It was narrated that 'Umar bin Khattab said: The Messenger of Allah (ﷺ) said: "No people's deeds ever became evil deeds but they started to adorn their places of worship."

It was narrated that Anas bin Malik said: "The location where the Prophet's Mosque was built belonged to Banu Najjar. In it there were date-palm trees and graves of the idolaters. The Prophet (ﷺ) said to them: 'Name its price.' They said: 'We will never take any money for it.' The Prophet (ﷺ) built it and they were assisting him, and the Prophet (ﷺ) was saying: 'The real life is the life of the Hereafter so forgive the Ansar and the Muhajirah.' Before the mosque was built, the Prophet (ﷺ) would perform prayer wherever he was when the time for prayer came."

It was narrated from 'Uthman bin Abul-'As that: The Messenger of Allah (ﷺ) commanded him to build the mosque of Ta'if in the place where the Taghuts used to be.

It was narrated that Ibn 'Umar was asked about gardens in which excrement was thrown.: He said: "If it has been watered several times, then perform prayer there," and he attributed that to the Prophet.

It was narrated that Abu Sa'eed Khudri said: "The Messenger of Allah (ﷺ) said: 'All the earth is a mosque, except for graveyards and Hammam.'"

It was narrated that Ibn 'Umar said: "Allah's Messenger (ﷺ) prohibited prayer from being performed in seven places: The garbage dump, the slaughtering area, the graveyard, the commonly used road, the bathroom, in the area that camels rest at, and above the Ka'bah."

It was narrated from 'Umar bin Khattab that: The Messenger of Allah (ﷺ) said: "There are seven places where it is not permissible to perform the prayer: The top of the House of Allah; graveyards; garbage dumps; slaughterhouses; bathrooms; the area that camels rest, and the main road."

It was narrated from Ibn 'Umar that: The Messenger of Allah (ﷺ) said: "There are things which are not befitting for the mosque: it should not be taken as a thoroughfare; weapons should not be unsheathed in it; bows should not be drawn nor arrows shot in it; no one should pass through it carrying raw meat; no prescribed punishment or retaliatory punishment should be carried out in it; and it should not be used as a marketplace."

It was narrated from 'Amr bin Shu'aib from his father that his grandfather said: "The Messenger of Allah (ﷺ) forbade buying and selling in the mosque, and reciting poetry in the mosque."

It was narrated that Ibn 'Umar said: "We used to sleep in the mosque at the time of the Messenger of Allah."

Ya'ish bin Qais bin Tikhfah narrated that his father, who was one of the people of Suffah, said: "The Messenger of Allah (ﷺ) said to us: 'Come with me.' So we went to the house of 'Aishah, where we ate and drank. Then the Messenger of Allah (ﷺ) said to us: 'If you want, you can sleep here, or if you want you can go out to the mosque.' We said: 'We will go out to the mosque.'"

It was narrated from Abu Hurairah that: A man among the Ansar sent word to the Messenger of Allah (ﷺ) saying: "Come and designate a place in my house where I can perform prayer,' that was after he had become blind. So he went and did that.

It was narrated that Abu Sa'eed Al-Khudri said: "The Messenger of Allah (ﷺ) said: 'Whoever removes something harmful from the mosque, Allah will build for him a house in Paradise.'"

It was narrated from 'Aishah that: The Messenger of Allah (ﷺ) commanded that places of prayer be established in villages, and that they be purified and perfumed.

It was narrated that Abu Sa'eed Al-Khudri said: "The first person who put lamps in the mosque was Tamim Ad-Dari."

It is narrated from Abu Hurairah and Abu Sa'eed Al-Khudri that: The Messenger of Allah (ﷺ) saw some sputum on the wall of the mosque. He picked up a stone and scraped it off, then he said, "If anyone of you needs to spit, he should not spit in fro not of him or to his right; let him spit to his right; let him spit to his left or under his left foot."