(Hast thou not seen those who praise themselves for purity?) [4:49]. Said al-Kalbi: “This was revealed about a group of Jewish men who went to the Messenger of Allah, Allah bless him and give him peace, and said: ‘O Muhammad! Do these children of ours incur any sins?’ ‘No!’ he replied. They said: ‘By Him by means of Whom we swear, we are just like them; there is no sin that we commit during the day except that it is expiated comes the night, and there is no sin that we commit at night except that it is expiated comes the day’. This is how they praised themselves for purity”.
Asbab Al-Nuzul by Al-Wahidi , trans. Mokrane Guezzou
