Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) narrates: In the blessed time of the Prophet (peace and blessings be upon him), two men disagreed about the mosque whose foundation was laid on piety (taqwa). One of them said that it meant the Prophet's Mosque, and the other said that it meant the Mosque of Quba. They both came to the Prophet (peace and blessings be upon him) and asked him about it, and the Prophet (peace and blessings be upon him) said: "It means this mosque of mine."
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الحج / 5893