حَدَّثَنَا أَبُو نُعَيْمٍ قَالَ حَدَّثَنَا مِسْعَرٌ عَنْ زِيَادٍ قَالَ سَمِعْتُ الْمُغِيرَةَ رَضِيَ اللَّهُ عَنْهُ يَقُولُ إِنْ کَانَ النَّبِيُّ صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ لَيَقُومُ لِيُصَلِّيَ حَتَّی تَرِمُ قَدَمَاهُ أَوْ سَاقَاهُ فَيُقَالُ لَهُ فَيَقُولُ أَفَلَا أَکُونُ عَبْدًا شَکُورًا
صحیح بخاری · Hadith 1130
Narrated Al-Mughira: The Prophet used to stand (in the prayer) or pray till both his feet or legs swelled. He was asked why (he offered such an unbearable prayer) and he said, "should I not be a thankful slave."
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020