Shama'il al-Muhammadiya 248

Mughirah bin Shu'bah (may Allah be pleased with him) reports that Rasuluilah ﷺ performed such lengthy nafl prayers, that his mubaarak legs became swollen. The Sahaabah said :
"You undergo such great difficulties, where Allah had forgiven your past and the future sins. "Messenger of Allah ﷺ said: "(When Allah Ta'aala has blessed me so much) should I not be a grateful servant?"

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، وَبِشْرُ بْنُ مُعَاذٍ، قَالا: حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ زِيَادِ بْنِ عِلاقَةَ، عَنِ الْمُغِيرَةِ بْنِ شُعْبَةَ، قَالَ: صَلَّى رَسُولُ اللهِ ﷺ، حَتَّى انْتَفَخَتْ قَدَمَاهُ، فَقِيلَ لَهُ: أَتَتَكَلَّفُ هَذَا، وَقَدْ غَفَرَ اللَّهُ لَكَ مَا تَقَدَّمَ مِنْ ذَنْبِكَ وَمَا تَأَخَّرَ؟ قَالَ: أَفَلا أَكُونُ عَبْدًا شَكُورًا.