Muhammad bin 'Abdul A'la محمد بن عبد الأعلى · The Book of al-Bay'ah

"Among the delegation of Thaqif there was a man who suffered from leprosy. The Prophet sent word to him saying: 'Go back, for I have accepted your pledge."'

"We were with the Prophet in a gathering and he said: 'Pledge to me that you will not associate anything with Allah, you will not steal, and you will not have unlawful sexual relations.' He recited the Verse to them (and said) Whoever does any of these things, and Allah conceals him then it is up to Allah, the mighty and Sublime: If He wills, He will punish him, and if He wills, He will forgive him.