It was narrated that 'Aishah said:
"There are two prayers that the Messenger of Allah (ﷺ) never neglected to pray them in my house secretly nor publicly: Two Rak'ahs before Fajr and two Rak'ahs after 'Asr."
English reference: Vol. 1, Book 6, Hadith 578
Arabic reference: Book 6, Hadith 584