“The Messenger of Allah ﷺ stood (in prayer) until his feet became swollen. It was said: ‘O Messenger of Allah, Allah has forgiven you your past and future sins.’ He said: ‘Should I not be a thankful slave?’”
قَامَ رَسُولُ اللَّهِ ﷺ حَتَّى تَوَرَّمَتْ قَدَمَاهُ فَقِيلَ يَا رَسُولَ اللَّهِ قَدْ غَفَرَ اللَّهُ لَكَ مَا تَقَدَّمَ مِنْ ذَنْبِكَ وَمَا تَأَخَّرَ قَالَ أَفَلاَ أَكُونُ عَبْدًا شَكُورًا