[Machine] A man came to the Prophet ﷺ and said, "Which sin is the greatest?" The Prophet replied, "To associate partners with Allah while He has created you." The man asked again, "Then what?" The Prophet said, "To kill your child out of fear that he will share your food with you." The man asked once more, "Then what?" The Prophet replied, "To commit adultery with your neighbor's wife." At that moment, Allah revealed in His book the confirmation of what the Prophet had said, "And those who do not invoke with Allah another deity or kill the soul which Allah has forbidden [to be killed], except by right, and do not commit adultery. And whoever should do that will meet a penalty" (Quran 25:68).
جَاءَ رَجُلٌ إِلَى النَّبِيِّ ﷺ فَقَالَ أَيُّ الذَّنْبِ أَكْبَرُ؟ قَالَ أَنْ تَجْعَلَ لِلَّهِ نِدًّا وَهُوَ خَلَقَكَ قَالَ ثُمَّ أَيٌّ؟ قَالَ ثُمَّ أَنْ تَقْتُلَ وَلَدَكَ مِنْ أَجْلِ أَنْ يَطْعَمَ مَعَكَ قَالَ ثُمَّ أَيٌّ؟ قَالَ ثُمَّ أَنْ تُزَانِيَ بِحَلِيلَةِ جَارِكَ قَالَ فَأَنْزَلَ اللهُ ﷻ تَصْدِيقَ ذَلِكَ فِي كِتَابِهِ {وَالَّذِينَ لَا يَدْعُونَ مَعَ اللهِ إِلَهًا آخَرَ} [الفرقان 68] إِلَى قَوْلِهِ {وَمَنْ يَفْعَلْ ذَلِكَ يَلْقَ أَثَامًا} [الفرقان 68]