English translation
6861. Narrated 'Abdullāh عَنِ اللَّهِ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: A man said, "O Allāh's Messenger! Which sin is the greatest in Allāh's consideration?" The Prophet ﷺ said, "To set up a rival unto Allāh, though, He Alone created you." The man asked, "What is (the) next (greatest sin)?" The Prophet ﷺ said, "To kill your son, lest he should share your food with you." The man said, "What is (the) next (greatest sin)?" The Prophet ﷺ said, "To commit illegal sexual intercourse with the wife of your neighbour." So Allāh عَزَّ وَجَلَّ revealed in confirmation of this narration: "And those who invoke no other ilāh (god) along with Allāh nor kill such person as Allāh has forbidden, except for just cause, nor commit illegal sexual intercourse – and whoever does this shall receive the punishment." (V.25:68)