Narrator:Abdullah ibn Mas‘ūd
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 "
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."
Reported by Al-Bukhari (No. 6811, 4477, 4761, 6001, 6861, 7520, 7532), Muslim (No. 86a, 86b), Abu Dawud (No. 2310), At-Tirmidhi (No. 3182, 3183), An-Nasa’i (No. 4013, 4014, 4015) and Ahmad (No. 3430, 3893, 3921, 4179, 4191).