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. [Agreed upon].

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 عَلَيْه ِ [1]‏ .‏