Read all Ahadith in the book on the mosques and the congregations by sunan ibn e majah

It was narrated that 'Umar bin Khattab said: I heard the Messenger of Allah 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 say: 'Whoever builds a mosque for the sake of Allah, Allah will build something similar for him in Paradise.'

It was narrated that 'Ali bin Abu Talib said: The Messenger of Allah said: 'Whoever builds a mosque for the sake of Allah (from his own wealth), Allah will build a house for him in Paradise.'

It was narrated from Jabir bin 'Abdullah that: The Messenger of Allah 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 Anas bin Malik said: The Messenger of Allah said: 'The Hour will not begin until the people compete in (building) mosques.'

It was narrated that Ibn 'Abbas said: The Messenger of Allah 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 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 said to them: 'Name its price.' They said: 'We will never take any money for it.' The Prophet built it and they were assisting him, and the Prophet 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 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 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.