Wadah bin 'Abdullah al-Yashkari وضاح بن عبد الله اليشكري أبو عوانة · The Book of Salah

"Urwah told me that 'Aishah said: 'Allah enjoined the salah upon the Messenger of Allah (ﷺ), and the first thing that He enjoined was two Rak'ahs at a time, then it was made complete four Rak'ahs while in the state of residence but the prayer when traveling remained two Rak'ahs, as it was first enjoined.'"

"Abu Al-Malih narrated to me: 'We were with Buraidah on a cloudy day and he said: "Pray early, for the Messenger of Allah (ﷺ) said: 'Whoever abandons Salat Al-'Asr, his good deeds will perish.'"