Hadith 739
´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.'"
Hadith 740
´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."
Hadith 741
´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."