Wahb bin Jarir bin Hazim bin Zayd وهب بن جرير بن حازم بن زيد · The Book on Traveling

"We asked Ali about the prayer of the Messenger of Allah during the day. He said: 'You will not be able to do that.' We said: 'Whoever among is able (he will)?' So he said: 'When the sun appeared over there (east) like it appears here (west) at Asr, the Messenger of Allah would pray two Rak'ah, and when the sun appeared over there (east) like it appears here (west) at Zuhr, he would pray four Rak'ah. And he would…