حَدَّثَنَا زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنْ عَمْرٍو، قَالَ أَخْبَرَنِي بِذَا أَبُو مَعْبَدٍ، - ثُمَّ أَنْكَرَهُ بَعْدُ - عَنِ ابْنِ عَبَّاسٍ، قَالَ كُنَّا نَعْرِفُ انْقِضَاءَ صَلاَةِ رَسُولِ اللَّهِ صلى الله عليه وسلم بِالتَّكْبِيرِ ‏.‏

Ibn 'Abbas reported

We knew the finishing of the prayer of the Messenger of Allah (ﷺ) through takbir. 'Amr (b. Dinar) said: I made a mention of it to Abu Mas'ud. hue he rejected it and said: I never narrated it to you. 'Amr said: He did narrate it before this.