Mughira b. Shu'ba reported that Allah's Apostle (ﷺ) worshipped so much that his feet were swollen. It was said to him:
(Why do you undergo so much hardship despite the fact that) Allah has pardoned for you your earlier and later sins? Thereupon he said: May I not (prove myself) to be a grateful servant (of Allah)?
Reference: Sahih Muslim 2819 a In-book : Book 52, Hadith 77 USC-MSA web (English) : Book 39, Hadith 6772 (deprecated)
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