Imām Bukhārī narrates: Muhammad ibn 'Ar'arah narrated to us, he said: Shu'bah narrated to us, from Abī Ishāq, he narrated: I saw al-Aswad and Masrūq; the two of them came to 'Ā'ishah, may Allāh be pleased with her. 'Ā'ishah said:
The Prophet ﷺ, on whichever day he came to me after the 'Asr prayer, used to pray two rak'ahs.
حَدَّثَنَا مُحَمَّدُ بْنُ عَرْعَرَةَ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ أَبِي إِسْحَاقَ، قَالَ رَأَيْتُ الأَسْوَدَ وَمَسْرُوقًا شَهِدَا عَلَى عَائِشَةَ قَالَتْ مَا كَانَ النَّبِيُّ صلى الله عليه وسلم يَأْتِينِي فِي يَوْمٍ بَعْدَ الْعَصْرِ إِلاَّ صَلَّى رَكْعَتَيْنِ.
Reference: Sahih Al Bukhari 593