Narrated It is also reported from Abu Huraira, may Allah be well pleased with him that:
Allah’s Messenger (Allah bless him and give him peace) used to stand performing the ritual prayer until his feet had begun to swell, so he would be asked: “O Messenger of Allah, must you do this, when Allah has already forgiven you your former and your latter sins?” He replied: “Shall I not be a thankful servant?”
Narrated Abu Huraira said (may Allah be well pleased with him):
"Allah’s Messenger (Allah bless him and give him peace) used to perform the ritual prayer until his feet had begun to swell, so he was asked: 'Must you do this, when it has come to you that Allah has already forgiven you your former and your latter sins?’ He replied: 'Shall I not be a thankful servant?'”
“I asked 'A'sha (may Allah be well pleased with her) about the nighttime ritual prayer of Allah’s Messenger (Allah bless him and give him peace), so she said: ‘He used to sleep at the beginning of the night. Then he would get up, and when it was the time before daybreak, he performed a witr . Then he came to his
mattress, and if he had a need, he had sexual intercourse with his wife. When he heard the call to prayer, he sprang up, and if he was in a state of major ritual impurity, he poured
water over himself, and if not, he performed the minor ritual ablution and went out to the ritual prayer.”
Narrated Al-Mughira ibn Shu'ba said (may Allah be well pleased with him):
"Allah’s Messenger (Allah bless him and give him peace) performed the ritual prayer until his feet became swollen, so he was asked: 'Must you burden yourself with this, when
Allah has already forgiven you your former and your latter sins?' He replied: 'Shall I not be a thankful servant?'”