It is reported from Mahmud bin Labid (may Allah be pleased with him) that when Sayyiduna Uthman (may Allah be pleased with him) intended to build the mosque, the people disliked it and wanted him to leave it as it was. Sayyiduna Uthman (may Allah be pleased with him) said: "I heard the Messenger of Allah (peace and blessings be upon him) say: 'Whoever builds a mosque for Allah, Allah will build for him a house in Paradise.'"
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الوقف / 11932