Sahih al-Bukhari 7520
Sahih al-Bukhari · Book 97: Oneness, Uniqueness of Allah (Tawheed) · “….Then do not set up rivals unto Allah while you know.”
Narrated `Abdullah:
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ ، حَدَّثَنَا جَرِيرٌ ، عَنْ مَنْصُورٍ ، عَنْ أَبِي وَائِلٍ ، عَنْ عَمْرِو بْنِ شُرَحْبِيلَ ، عَنْ عَبْدِ اللَّهِ ، قَالَ سَأَلْتُ النَّبِيَّ صلى الله عليه وسلم أَىُّ الذَّنْبِ أَعْظَمُ عِنْدَ اللَّهِ قَالَ " أَنْ تَجْعَلَ لِلَّهِ نِدًّا وَهْوَ خَلَقَكَ ". قُلْتُ إِنَّ ذَلِكَ لَعَظِيمٌ. قُلْتُ ثُمَّ أَىّ قَالَ " ثُمَّ أَنْ تَقْتُلَ وَلَدَكَ تَخَافُ أَنْ يَطْعَمَ مَعَكَ ". قُلْتُ ثُمَّ أَىّ قَالَ " ثُمَّ أَنْ تُزَانِيَ بِحَلِيلَةِ جَارِكَ " .
I asked Allah's Messenger (ﷺ) "What is the biggest sin in the sight of Allah?" He said, "To set up rivals unto Allah though He alone created you." I said, "In fact, that is a tremendous sin," and added, "What next?" He said, "To kill your son being afraid that he may share your food with you." I further asked, "What next?" He said, "To commit illegal sexual intercourse with the wife of your neighbor."