Fiqh-us-Sunnah Volume 5, Hajj and ‘Umrah, Fiqh 5.135A.

Section : Offering Prayers in the Mosque of Quba.

The Prophet (peace be upon him) 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.” This was reported by Ahmad, Nasa’i, Ibn Majah, and Al-Hakim, who says it has a sound chain of narration.