´It was narrated that Abu Hurairah said:` “The Messenger of Allah (ﷺ) used to pray until his feet became swollen. It was said: ‘O Messenger of Allah, Allah has forgiven you your past and future sins.’ He said: ‘Should I not be a thankful slave?’”
Related hadith on this topic
Explanation & Benefits
Hafiz Muhammad Ameen
1646. Commentary: The point of bursting after thinking, that is, it was bound to happen eventually, but there was never any sense of laziness found in the Prophet sallallahu alayhi wa sallam.
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 1646