Sahih Al Bukhari Hadith Number 1188

Narrated Quza’a: I heard Abu Said saying four words. He said, “I heard the Prophet (peace be upon him) (saying the following narrative).” He had participated in twelve holy battles with the Prophet.

20  Virtues of Prayer at Masjid Makkah and Madinah
Hadith number 1188
Volume no 2
Chapter: 1 (The superiority of offering As-Salat in the Mosque of Makkah and Al-Madina)