(1) باب فَضْلِ الصَّلاَةِ فِي مَسْجِدِ مَكَّةَ وَالْمَدِينَةِ
Narrated Quza'a:
I heard Abu Said saying four words. He said, "I heard the Prophet (ﷺ) (saying the following narrative)." He had participated in twelve holy battles with the Prophet.
Reference: Sahih al-Bukhari 1188
In-book reference: Book 20, Hadith 1
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 21, Hadith 281