Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Among the signs of the Hour is that people will boast and take pride regarding the mosques."
Hadith Referenceصحيح ابن خزيمه / جماع أبواب فضائل المساجد وبنائها وتعظيمها / 1322