Sayyiduna Sahl bin Sa’d (may Allah be pleased with him) narrates: There was a disagreement between two men regarding the mosque which was founded on piety. One of them said that (by this) is meant the mosque of Madinah Munawwarah (i.e., Masjid Nabawi), and the other said it is Masjid Quba. They both came to the service of the Prophet (peace and blessings be upon him), so he said:“By this is meant this mosque of mine.”