Sahih Al Bukhari Hadith Number 1193

Narrated `Abdullah bin Dinar: Ibn `Umar said, “The Prophet (peace be upon him) used to go to the Mosque of Quba every Saturday (sometimes) walking and (sometimes) riding.” `Abdullah (Ibn `Umar) used to do the same.

20  Virtues of Prayer at Masjid Makkah and Madinah
Hadith number 1193
Volume no 2
Chapter: 3 (Whoever visited the mosque of Quba every Saturday)