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muslim:1146c – ʿAbd al-Razzāq > Ibn Jurayj > Yaḥyá b. Saʿīd Bihadhā al-Isnād > Faẓanant

" Yahya said: I think it was due to the regard for the Messenger of Allah ﷺ."  

مسلم:١١٤٦c – وَحَدَّثَنِيهِ مُحَمَّدُ بْنُ رَافِعٍ حَدَّثَنَا عَبْدُ الرَّزَّاقِ أَخْبَرَنَا ابْنُ جُرَيْجٍ حَدَّثَنِي يَحْيَى بْنُ سَعِيدٍ بِهَذَا الإِسْنَادِ وَقَالَ فَظَنَنْتُ

أَنَّ ذَلِكَ لِمَكَانِهَا مِنَ النَّبِيِّ ﷺ يَحْيَى يَقُولُهُ  

See similar narrations below:

Collected by Muslim
muslim:1146b – Isḥāq b. Ibrāhīm > Bishr b. ʿUmar al-Zahrānī > Sulaymān b. Bilāl > Yaḥyá b. Saʿīd Bihadhā al-Isnād Ghayr

This hadith is narrated on the authority of Yahya b. Sa'id with the same chain of transmitters but with this variation that he said that ('A'isha did not observe fast but in Sha'ban) out of regard for the Messenger of Allah ﷺ.  

مسلم:١١٤٦b – وَحَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ أَخْبَرَنَا بِشْرُ بْنُ عُمَرَ الزَّهْرَانِيُّ حَدَّثَنِي سُلَيْمَانُ بْنُ بِلاَلٍ حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ بِهَذَا الإِسْنَادِ غَيْرَ

أَنَّهُ قَالَ وَذَلِكَ لِمَكَانِ رَسُولِ اللَّهِ ﷺ