جَامِعُ التِّرْمِذِيِّ
Jami‘ at-Tirmidhi 341
The Book on Salat (Prayer)
What Has Been Related About The Beginning Of The Qiblah
حَدَّثَنَا هَنَّادٌ، حَدَّثَنَا وَكِيعٌ، عَنْ سُفْيَانَ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنِ ابْنِ عُمَرَ، قَالَ كَانُوا رُكُوعًا فِي صَلاَةِ الصُّبْحِ . قَالَ أَبُو عِيسَى وَحَدِيثُ ابْنِ عُمَرَ حَدِيثٌ صَحِيحٌ .
Ibn Umar said: "They were bowing during the Subh (Fajr) Prayer."
Jami` at-Tirmidhi, 341Sahih (Darussalam)