Abdullah bin Tawus عبد الله بن طاوس · 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."

"The Messenger of Allah (ﷺ)forbade praying after 'Asr unless the sun was still white, clear and high."

"My father told me: 'Aishah said: 'The Messenger of Allah (ﷺ) never neglected to pray two Rak'ahs after 'Asr in my house.'"