(4) باب ذِكْرِ أَعْظَمِ الذَّنْبِ وَاخْتِلاَفِ يَحْيَى وَعَبْدِ الرَّحْمَنِ عَلَى سُفْيَانَ فِي حَدِيثِ وَاصِلٍ عَنْ أَبِي وَائِلٍ عَنْ عَبْدِ اللَّهِ فِيهِ
It was narrated that 'Abdullah said:
"I said: 'O Messenger of Allah, which sin is most grievous?' He said: 'Setting up a rival to Allah while it is He that created you.' I said: 'Then what?' He said: 'Killing your child so that he will not eat with you.' I said: 'Then what?' He said: 'Committing adultery with your neighbor's wife.'"
Reference: Sunan an-Nasa'i 4014
In-book reference: Book 37, Hadith 49
English translation: Vol. 5, Book 37, Hadith 4019