(3) باب وَقْتِ صَلاَةِ الظُّهْرِ
It was narrated that Abu Barzah Al-Aslami said:
"The Prophet used to pray the Hajir prayer, which you call 'Zuhr', when the sun had passed its zenith."
Reference: Sunan Ibn Majah 674
In-book reference: Book 2, Hadith 8
English translation: Vol. 1, Book 2, Hadith 674