حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنْ زِيَادِ بْنِ عِلاَقَةَ، سَمِعَ الْمُغِيرَةَ، يَقُولُ قَامَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ حَتَّى تَوَرَّمَتْ قَدَمَاهُ ‏.‏ فَقِيلَ يَا رَسُولَ اللَّهِ قَدْ غَفَرَ اللَّهُ لَكَ مَا تَقَدَّمَ مِنْ ذَنْبِكَ وَمَا تَأَخَّرَ ‏.‏ قَالَ ‏"‏ أَفَلاَ أَكُونُ عَبْدًا شَكُورًا ‏"‏ ‏.‏

It wasnarrated from Ziyad bin ‘Ilaqah that he heard Mughirah say: “TheMessenger of Allah (PBUH) stood (in prayer) until his feet becameswollen. It was said: ‘O Messenger of Allah, Allah has forgiven youyour past and future sins.’ He said: ‘Should I not be a thankfulslave?’” Translation Not Available

Book Ref: Sunan Ibn Majah Book 5 Hadith 1419
Web Ref:  Sunan Ibn Majah Vol 1 Book 5 Hadith 1419