"The Messenger of Allah (ﷺ) used to pray until he developed fissures in his feet."
Sunan an-Nasa'i Book 20, Hadith 48
← Previous Hadith "I heard Al-Mughirah bin Shu'bah say: 'The Prophet (ﷺ) stood (in prayer at night) until his feet swelled up, and it was said to him: Allah has forgiven your past and future sins. He said: "Should I not be a thankful slave?'"

Sunan an-Nasa'i Book 20, Hadith 47 Next Hadith → "The Messenger of Allah (ﷺ) used to pray for a long time at night. If he started to pray standing, he would bow standing and if he started to pray sitting, he would bow sitting."

Sunan an-Nasa'i Book 20, Hadith 49