Imām al-Bukhārī narrates: ʿAbdullāh bin Yūsuf narrated to us, he said: Imām Mālik informed us, from Ṣāliḥ bin Kaysān, from ʿUrwah bin al-Zubayr, from ʿĀ'ishah, Umm al-Mu'minīn

Allāh made prayer obligatory. When He made prayer obligatory, He made two rak‘āt obligatory, at home and on journey. Then the prayer of journey remained as it was, and the prayer at home was increased.