Sunan An-Nasa'i

It was narrated that Ziyad bin Ilaqah said:""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?