Ma'mar bin Rashid معمر بن راشد · The Book of the Times (of Prayer)

"Whoever catches up with a Rak'ah of the Subh prayer before the sun rises, then he has caught up with Subh, and whoever catches up with a Rak'ah of 'Asr prayer before the sun sets, then he has caught up with 'Asr."

'Are you not going to pray?' He said: 'The Messenger of Allah (ﷺ) said: 'There is no prayer after 'Asr until the sun has set, nor after Subh until the sun has risen.'"

"I came to the Messenger of Allah, who became Muslim with you?' He said: 'Free men and slaves.' I said: 'Is there any moment which brings one closer to Allah than another?' He said: 'Yes, the last part of the night, so pray as much as you want until you pray Subh, then stop until the sun has risen until and it looks like a shield and (its shinning)spreads. Then pray as much as you want until an object's shadow…

"The Messenger of Allah (ﷺ) traveled until he came to 'Arafah, where he found that the tent had pitched for him. He stayed there until the sun had passed its zenith, then he called for Al-Qaswa' which was saddled for him. When he reached the bottom of the valley he addressed the people. Then Bilal called the Adhan, then the Iqamah, then he prayed Zuhr, then he called the Iqamah, then he prayed 'Asr, and he did not offer any…

"The Messenger of Allah (ﷺ) set out at nightfall, then stopped to camp at the end of the night, and he did not wake up until the sun had risen or had partly risen. He did not pray until the sun had risen (fully), then he prayed, and that was the 'middle prayer' (Salat Al-Wusta)."