Hadith on Sins: Major sins are idolatry, infanticide, and adultery

Abdullah ibn Mas’ud reported: I said, “O Messenger of Allah, what is the greatest sin?” The Prophet, peace and blessings be upon him, said, “To set up a partner alongside Allah even though He alone created you.” I said, “What is next?” The Prophet said, “To kill your child, fearing he will eat with you.” I said, “What is next?” The Prophet said, “To commit adultery with the wife of your neighbor.” Then, Allah confirmed the saying of the Prophet with the verse, “Those who do not call upon another god besides Allah…” (25:68)

Source: Ṣaḥīḥ al-Bukhārī 5655, Ṣaḥīḥ Muslim 86

Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim

عَنْ عَبْدِ اللَّهِ قَالَ قُلْتُ يَا رَسُولَ اللَّهِ أَيُّ الذَّنْبِ أَعْظَمُ قَالَ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنْ تَجْعَلَ لِلَّهِ نِدًّا وَهُوَ خَلَقَكَ قُلْتُ ثُمَّ أَيُّ قَالَ أَنْ تَقْتُلَ وَلَدَكَ خَشْيَةَ أَنْ يَأْكُلَ مَعَكَ قَالَ ثُمَّ أَيُّ قَالَ أَنْ تُزَانِيَ حَلِيلَةَ جَارِكَ وَأَنْزَلَ اللَّهُ تَصْدِيقَ قَوْلِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَالَّذِينَ لَا يَدْعُونَ مَعَ اللَّهِ إِلَهًا آخَرَ

5655 صحيح البخاري كتاب الأدب باب قتل الولد خشية أن يأكل معه

86 صحيح مسلم كتاب الإيمان باب كون الشرك أقبح الذنوب وبيان أعظمها بعده