It was narrated from Umm Salamah that the Prophet ﷺ once prayed two Rak'ahs after 'Asr in her house. She asked him about that and he said:

"They are two Rak'ahs that I used to pray after Zuhr, but I got distracted and forgot them until I prayed 'Asr."

أَخْبَرَنِي مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، قَالَ حَدَّثَنَا الْمُعْتَمِرُ، قَالَ سَمِعْتُ مَعْمَرًا، عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ، عَنْ أَبِي سَلَمَةَ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ أُمِّ سَلَمَةَ، أَنَّ النَّبِيَّ ﷺ صَلَّى فِي بَيْتِهَا بَعْدَ الْعَصْرِ رَكْعَتَيْنِ مَرَّةً وَاحِدَةً وَأَنَّهَا ذَكَرَتْ ذَلِكَ لَهُ فَقَالَ " هُمَا رَكْعَتَانِ كُنْتُ أُصَلِّيهِمَا بَعْدَ الظُّهْرِ فَشُغِلْتُ عَنْهُمَا حَتَّى صَلَّيْتُ الْعَصْرَ " .