I asked Khabbab whether the Prophet used to recite the Qur'an in the ...

Hadith 1:727

Narrated Abu Ma'mar:

I asked Khabbab whether the Prophet used to recite the Qur'an in the Zuhr and the 'Asr prayers. He replied in the affirmative. We said, "How did you come to know that?" He said, "From the movement of his beard."