مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1885
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that ‘Ikrimah said: I said to Ibn "Abbas: I prayed Zuhr in al-Batha" behind a foolish old man and he said twenty-two takbeers, saying takbeer when he prostrated and when he raised his head. Ibn "Abbas said: That is the prayer of Abul-Qasim (رضي الله عنه) .
Musnad Ahmad 1886Sahih hadeeth; and its isnad is da'eef]