The Quba Mosque (Arabic: مَسْجِد قُبَاء‎, romanized: Masjid Qubāʾ, Hejazi Arabic pronunciation: [mas.dʒɪd ɡʊ.ba]) is a mosque located in Medina, in the Hejazi region of Saudi Arabia, built in the lifetime of the Islamic prophet Muhammad in the 7th century C.E.It is thought to be the first mosque in the world, built on the first day of Muhammad’s emigration to Medina. Its first stone is said to have been laid by the prophet, and the structure completed by his companions.

As per historical Islamic texts, Muhammad spent 14 days in this mosque praying qaṣr (Arabic: قَصْر, a short prayer) while waiting for Ali to arrive in Medina, after he stayed behind in Mecca to safeguard Muhammad’s life and escape, by sleeping in Muhammad’s bed in his place Performing Wuḍūʾ (‘Ablution’) in one’s home, then offering two Rakaʿāt of Nafl (Optional) prayers in the Quba Mosque, is considered to be equal to performing one ʿUmrah. Muhammad used to go there, riding or on foot, every Saturday and offer a two rakaʿāt 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.” This ḥadīth was reported by Ahmad ibn Hanbal, Al-Nasa’i, Ibn Majah and Hakim al-Nishaburi.[citation needed] Initially, the mosque was built 6 kilometres (3.7 miles) off Medina in the village of Quba, before Medina expanded to include this village.