The Book of Prayer
Bulugh al-Maram #497
كتاب الصلاة
وَعَنْ اِبْنِ عَبَّاسٍ رَضِيَ اَللَّهُ عَنْهُمَا قَالَ: «صَلَّيْتُ مَعَ رَسُولِ اَللَّهِ - صلى الله عليه وسلم -ذَاتَ لَيْلَةٍ, فَقُمْتُ عَنْ يَسَارِهِ, فَأَخَذَ رَسُولُ اَللَّهِ - صلى الله عليه وسلم -بِرَأْسِي مِنْ وَرَائِي, فَجَعَلَنِي عَنْ يَمِينِهِ» مُتَّفَقٌ عَلَيْهِ
Narrated Ibn 'Abbas (RA):
“I prayed (the night Tahajjud prayer) with Allah's Messenger (ﷺ) one night and I stood on his left side, whereupon he took me by the back of my head and made me go round to his right side.
وَعَنْ اِبْنِ عَبَّاسٍ رَضِيَ اَللَّهُ عَنْهُمَا قَالَ: "صَلَّيْتُ مَعَ رَسُولِ اَللَّهِ - صلى الله عليه وسلم -ذَاتَ لَيْلَةٍ, فَقُمْتُ عَنْ يَسَارِهِ, فَأَخَذَ رَسُولُ اَللَّهِ - صلى الله عليه وسلم -بِرَأْسِي مِنْ وَرَائِي, فَجَعَلَنِي عَنْ يَمِينِهِ" مُتَّفَقٌ عَلَيْهِ
"I prayed (the night Tahajjud prayer) with Allah's Messenger (ﷺ) one night and I stood on his left side, whereupon he took me by the back of my head and made me go round to his right side.
— Bulugh al-Maram, Hadith 497