The Quba Mosque (Quba' Masjid or Masjid al-Quba, Arabic: مسجد قباء), in the outlying environs of Madeena in Saudi Arebia, is the oldest mosque in the world. Its first stones were positioned by the Prophet Muhammad as soon as he arrived on his emigration from the city of Macca to Medina and the mosque was completed by his companions. Muhammad spent more than 20 nights in this mosque (after migrating) praying qasr (a short prayer) while waiting for Ali whose house was behind this mosque.

Muhammad used to go there, riding or on foot, every Saturday and offer a two rak'ah prayer. He advised others to do the same, saying, "Whoever makes ablutions at home and then goes and prays in the Mosque of Quba, he will have a reward like that of an 'Umrah.