‘Ikrima said:

I prayed behind an old man in Mecca and he said the <i>takbir</i> twenty-two times. When I said to Ibn ‘Abbas that the man was a fool, he replied, “I am surprised at you. It was the <i>sunna</i> of Abul Qasim.’’* *This is the Prophet’s <i>kunya</i>. Bukhari transmitted it.

وَعَنْ عِكْرِمَةَ قَالَ: صَلَّيْتُ خَلْفَ شَيْخٍ بِمَكَّةَ فَكَبَّرَ ثِنْتَيْنِ وَعِشْرِينَ تَكْبِيرَةً فَقُلْتُ لِابْنِ عَبَّاسٍ: إِنَّهُ أَحْمَقُ فَقَالَ: ثَكَلَتْكَ أُمُّكَ سُنَّةُ أَبِي الْقَاسِمِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ. رَوَاهُ الْبُخَارِيُّ