Abu Sa'id al-Khudri said, “We used to estimate how long Allah's Messenger ﷺ stood at the noon and the afternoon prayer, and we estimated that he stood in the first two rak'as as long as it takes to recite A.L.M. Tanzil, i.e. as-Sajda* (A version has, “In every rak'a as long as it takes to recite thirty verses.” We estimated that he stood half that time in the last two rak'as; that he stood in the first two of the afternoon prayer as long as he did in the last two at noon; and in the last two of the afternoon prayer about half that time.” * Al-Qur'an; 32. This sura has thirty verses. Muslim transmitted it.