Sahih Muslim Book 31, Hadith Number 6016.

Chapter : The merits of ‘Abdullah b. Mas’ud and that of his mother (Allah be pleased with them).

Abdullah reported that when this verse was revealed: “There is no harm on persons who believe and perform good acts, what they had eaten (formerly) when they avoided it (now) and they affirmed their faith” (v. 93) up to the end. Allah’s Messenger (may peace be upon him) said to me: You are one amongst them.