I said 'O Messenger of Allah ﷺ! Which sin is the greatest?" He said, "To set up a rival unto Allah, though He Alone created you." I said, "What next?" He said, "To kill your son lest he should share your food with you." I further asked, "What next?" He said, "To commit illegal sexual intercourse with the wife of your neighbor." And then Allah revealed as proof of the statement of the Prophet: 'Those who invoke not with Allah any other god)................. (to end of verse)...' (25.68)  

قُلْتُ يَا رَسُولَ اللَّهِ أَىُّ الذَّنْبِ أَعْظَمُ قَالَ أَنْ تَجْعَلَ لِلَّهِ نِدًّا وَهْوَ خَلَقَكَ ثُمَّ قَالَ أَىُّ قَالَ أَنْ تَقْتُلَ وَلَدَكَ خَشْيَةَ أَنْ يَأْكُلَ مَعَكَ قَالَ ثُمَّ أَىُّ قَالَ أَنْ تُزَانِيَ حَلِيلَةَ جَارِكَ وَأَنْزَلَ اللَّهُ تَصْدِيقَ قَوْلِ النَّبِيِّ ﷺ {وَالَّذِينَ لاَ يَدْعُونَ مَعَ اللَّهِ إِلَهًا آخَرَ}  

"I asked the Messenger of Allah [SAW], which sin is most grievous?" He said: "Shirk, setting up a rival to Allah, committing adultery with your neighbor's wife, and killing your child for fear of poverty, and that he may eat with you." Then 'Abdullah recited the Verse: "And those who invoke not any other Ilah (god) along with Allah." (Using translation from Nasāʾī 4015)   

سَأَلْتُ رَسُولَ اللهِ ﷺ أَيُّ الذَّنْبِ أَعْظَمُ؟ قَالَ «الشِّرْكُ أَنْ تَجْعَلَ لِلَّهِ نِدًا وَأَنْ تُزَانِي حَلِيلَةَ جَارِكَ وَأَنْ تَقْتُلَ وَلَدَكَ خَشْيَةَ الْفَقْرِ أَنْ يَأْكُلَ مَعْكَ» ثُمَّ قَرَأَ عَبْدُ اللهِ {وَالَّذِينَ لَا يَدْعُونَ مَعَ اللهِ إِلَهًا آخَرَ وَلَا يَقْتُلُونَ النَّفْسَ الَّتِى حَرَّمَ اللهُ إِلَّا بِالْحَقِّ وَلَا يَزْنُونَ} قَالَ أَبُو عَبْدِ الرَّحْمَنِ هَذَا خَطَأٌ لَا نَعْلَمُ أَنَّ أَحَدًا تَابَعَ يَزِيدَ عَلَيْهِ