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bukhari:590 – Abū Nuʿaym > ʿAbd al-Wāḥid b. Ayman from my father > ʿĀʾishah

By Allah, Who took away the Prophet. The Prophet ﷺ never missed them (two rakʿat) after the ʿAsr prayer till he met Allah and he did not meet Allah till it became heavy for him to pray while standing so he used to offer most of the prayers while sitting. (She meant the two rakʿat after ʿAsr) He used to pray them in the house and never prayed them in the mosque lest it might be hard for his followers and he loved what was easy for them .  

البخاري:٥٩٠ – حَدَّثَنَا أَبُو نُعَيْمٍ قَالَ حَدَّثَنَا عَبْدُ الْوَاحِدِ بْنُ أَيْمَنَ قَالَ حَدَّثَنِي أَبِي أَنَّهُ سَمِعَ عَائِشَةَ قَالَتْ

وَالَّذِي ذَهَبَ بِهِ مَا تَرَكَهُمَا حَتَّى لَقِيَ اللَّهَ وَمَا لَقِيَ اللَّهَ تَعَالَى حَتَّى ثَقُلَ عَنِ الصَّلاَةِ وَكَانَ يُصَلِّي كَثِيرًا مِنْ صَلاَتِهِ قَاعِدًا تَعْنِي الرَّكْعَتَيْنِ بَعْدَ الْعَصْرِ وَكَانَ النَّبِيُّ ﷺ يُصَلِّيهِمَا وَلاَ يُصَلِّيهِمَا فِي الْمَسْجِدِ مَخَافَةَ أَنْ يُثَقِّلَ عَلَى أُمَّتِهِ وَكَانَ يُحِبُّ مَا يُخَفَّفُ عَنْهُمْ  

See similar narrations below:

Collected by Bayhaqī
bayhaqi:4401 – Abū ʿAlī al-Rūdhbārī > Abū al-Ḥasan ʿAlī b. Muḥammad b. Sakhtawayh > Isḥāq b. al-Ḥasan > Abū Nuʿaym > ʿAbd al-Wāḥid b. Ayman from my father > ʿĀʾishah > Dakhal

[Machine] "And the one who took them, meaning the Messenger of Allah ﷺ , did not leave them until he met Allah. And he did not meet Allah until he fulfilled his obligation of prayer. He used to pray a lot of prayers while sitting or reclining. Then she said to him, 'Indeed, you have spoken the truth, but the Messenger of Allah ﷺ used to perform these prayers and not perform them in the mosque, fearing that it would be burdensome for his nation. And he used to love what is made easy for them.'"  

البيهقي:٤٤٠١ – أنبأ أَبُو عَلِيٍّ الرُّوذْبَارِيُّ ثنا أَبُو الْحَسَنِ عَلِيُّ بْنُ مُحَمَّدِ بْنِ سَخْتَوَيْهِ ثنا إِسْحَاقُ بْنُ الْحَسَنِ ثنا أَبُو نُعَيْمٍ ثنا عَبْدُ الْوَاحِدِ بْنُ أَيْمَنَ قَالَ حَدَّثَنِي أَبِي عَنْ عَائِشَةَ ؓ أَنَّهُ دَخَلَ عَلَيْهَا يَسْأَلُهَا عَنْ رَكْعَتَيْنِ بَعْدَ الْعَصْرِ فَقَالَتْ

وَالَّذِي هُوَ ذَهَبَ بِنَفْسِهِ تَعْنِي رَسُولَ اللهِ ﷺ مَا تَرَكَهُمَا حَتَّى لَقِيَ اللهَ ﷻ وَمَا لَقِيَ اللهَ حَتَّى ثَقُلَ عَنِ الصَّلَاةِ وَكَانَ يُصَلِّي كَثِيرًا مِنْ صَلَاتِهِ وَهُوَ قَاعِدٌ أَوْ جَالِسٌ فَقَالَ لَهَا إِنَّ عُمَرَ ؓ كَانَ يَنْهَى عَنْهُمَا وَيَضْرِبُ عَلَيْهِمَا فَقَالَتْ صَدَقْتَ وَلَكِنْ رَسُولُ اللهِ ﷺ كَانَ يُصَلِّيهِمَا وَلَا يُصَلِّيهِمَا فِي الْمَسْجِدِ مَخَافَةَ أَنْ يُثْقِلَ عَلَى أُمَّتِهِ وَكَانَ يُحِبُّ مَا يُخَفِّفُ عَنْهُمْ  

رَوَاهُ الْبُخَارِيُّ فِي الصَّحِيحِ عَنْ أَبِي نُعَيْمٍ