Sunan an-Nasa'i 1645
سنن النسائي#1645Sahihأَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا صَالِحُ بْنُ مِهْرَانَ، - وَكَانَ ثِقَةً - قَالَ حَدَّثَنَا النُّعْمَانُ بْنُ عَبْدِ السَّلاَمِ، عَنْ سُفْيَانَ، عَنْ عَاصِمِ بْنِ كُلَيْبٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُصَلِّي حَتَّى تَزْلَعَ يَعْنِي تَشَقَّقُ قَدَمَاهُ .
It was narrated that Abu Hurairah said:"The Messenger of Allah (ﷺ) used to pray until he developed fissures in his feet
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 20:48