Allah's Messenger you do this (in spite of the fact) that your earlier and later sins have been pardoned for you? Thereupon, he said. A'isha should I not prove myself to be a thanksgiving servant (of Allah)?
Sahih Muslim Book 52, Hadith 79
← Previous Hadith Allah's Apostle (ﷺ) kept standing in prayer (for such long hours) that his feet were swollen. They (his Companions) said: Verily, Allah has pardoned for thee the earlier and the later of thine sins. Thereupon he said: Should I not prove myself to be a grateful servant (of Allah)?

Sahih Muslim Book 52, Hadith 78 Next Hadith → We were sitting at the door of Abdullah (b. Mas'ud) waiting for him (to come out and deliver a sermon to us). It was at this time that there happened to pass by us Yazid b. Mu'awiya an-Nakha'i. We said: Inform him ('Abdullah b. Mas'ud) of our presence here. He went in and Abdullah b. Mas'ud lost no time in coming out to us and said: I was informed of your presence here but nothing hindered me to come out to you but the fact that I did not like to bore you (by stuffing your minds with sermons) as Allah's Messenger (ﷺ) did not deliver us sermon on certain days fearing that it might prove to be boring for us.

Sahih Muslim Book 52, Hadith 80