Narrated `Abdullah bin Mas`ud: I said, "O Allah's Messenger (ﷺ)! Which is the biggest sin?" He said, "To set up rivals to Allah by worshipping others though He alone has created you." I asked, "What is next?" He said, "To kill your child lest it should share your food." I asked, "What is next?" He said, "To commit illegal sexual intercourse with the wife of your neighbor."

Narrated `Abdullah bin Mas`ud: I said, "O Allah's Messenger (ﷺ)! Which is the biggest sin?" He said, "To set up rivals to Allah by worshipping others though He alone has created you." I asked, "What is next?" He said, "To kill your child lest it should share your food." I asked, "What is next?" He said, "To commit illegal sexual intercourse with the wife of your neighbor."

حَدَّثَنَا عَمْرُو بْنُ عَلِيٍّ، حَدَّثَنَا يَحْيَى، حَدَّثَنَا سُفْيَانُ، قَالَ حَدَّثَنِي مَنْصُورٌ، وَسُلَيْمَانُ، عَنْ أَبِي وَائِلٍ، عَنْ أَبِي مَيْسَرَةَ، عَنْ عَبْدِ اللَّهِ ـ رضى الله عنه ـ قَالَ قُلْتُ يَا رَسُولَ اللَّهِ أَىُّ الذَّنْبِ أَعْظَمُ قَالَ ‏"‏ أَنْ تَجْعَلَ لِلَّهِ نِدًّا وَهْوَ خَلَقَكَ ‏"‏‏.‏ قُلْتُ ثُمَّ أَىٌّ قَالَ ‏"‏ أَنْ تَقْتُلَ وَلَدَكَ مِنْ أَجْلِ أَنْ يَطْعَمَ مَعَكَ ‏"‏‏.‏ قُلْتُ ثُمَّ أَىٌّ قَالَ ‏"‏ أَنْ تُزَانِيَ حَلِيلَةَ جَارِكَ ‏"‏‏.‏ قَالَ يَحْيَى وَحَدَّثَنَا سُفْيَانُ، حَدَّثَنِي وَاصِلٌ، عَنْ أَبِي وَائِلٍ، عَنْ عَبْدِ اللَّهِ، قُلْتُ يَا رَسُولَ اللَّهِ، مِثْلَهُ، قَالَ عَمْرٌو فَذَكَرْتُهُ لِعَبْدِ الرَّحْمَنِ وَكَانَ حَدَّثَنَا عَنْ سُفْيَانَ عَنِ الأَعْمَشِ وَمَنْصُورٍ وَوَاصِلٍ عَنْ أَبِي وَائِلٍ عَنْ أَبِي مَيْسَرَةَ قَالَ دَعْهُ دَعْهُ‏.‏