Musnad Ahmad 2640

It was narrated that ‘Ikrimah said: I prayed behind an old man in Makkah and he said twenty two takbeers in Zuhr prayer. I came to Ibn 'Abbas and said: I prayed behind a foolish old man, he said takbeer twenty two times in Zuhr prayer. He said: May your mother be bereft of you! That is the Sunnah of Abul-Qasim (ﷺ).