It was narrated from Sa'eed bin Al-Musayyab that his father said:

"When Abu Talib was dying, the Prophet came to him and found Abu Jahl and 'Abdullah bin Abi Umayyah with him. He said: 'O uncle, say La ilaha illallah(there is none worthy of worship except Allah), a word with which I will defend you before Allah.' Abu Jahl and 'Abdullah bin Abi Umayyah said: 'O Abu Talib, are you turning away from the religion of 'Abdul-Muttalib.' Then the Prophet ﷺ said: 'I will keep on asking for Allah's forgiveness for you unless I am forbidden to do so.' Then the following was revealed: It is not (proper) for the Prophet and those who believe to ask Allah's forgiveness for the idolaters. And the following was revealed: Verily, you (O Muhammad) guide not whom you like."

أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، قَالَ حَدَّثَنَا مُحَمَّدٌ، - وَهُوَ ابْنُ ثَوْرٍ - عَنْ مَعْمَرٍ، عَنِ الزُّهْرِيِّ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، عَنْ أَبِيهِ، قَالَ : لَمَّا حَضَرَتْ أَبَا طَالِبٍ الْوَفَاةُ دَخَلَ عَلَيْهِ النَّبِيُّ ﷺ وَعِنْدَهُ أَبُو جَهْلٍ وَعَبْدُ اللَّهِ بْنُ أَبِي أُمَيَّةَ فَقَالَ : " أَىْ عَمِّ قُلْ لاَ إِلَهَ إِلاَّ اللَّهُ كَلِمَةً أُحَاجُّ لَكَ بِهَا عِنْدَ اللَّهِ عَزَّ وَجَلَّ " . فَقَالَ لَهُ أَبُو جَهْلٍ وَعَبْدُ اللَّهِ بْنُ أَبِي أُمَيَّةَ : يَا أَبَا طَالِبٍ أَتَرْغَبُ عَنْ مِلَّةِ عَبْدِ الْمُطَّلِبِ . فَلَمْ يَزَالاَ يُكَلِّمَانِهِ حَتَّى كَانَ آخِرُ شَىْءٍ كَلَّمَهُمْ بِهِ عَلَى مِلَّةِ عَبْدِ الْمُطَّلِبِ . فَقَالَ لَهُ النَّبِيُّ ﷺ : " لأَسْتَغْفِرَنَّ لَكَ مَا لَمْ أُنْهَ عَنْكَ " . فَنَزَلَتْ { مَا كَانَ لِلنَّبِيِّ وَالَّذِينَ آمَنُوا أَنْ يَسْتَغْفِرُوا لِلْمُشْرِكِينَ } وَنَزَلَتْ { إِنَّكَ لاَ تَهْدِي مَنْ أَحْبَبْتَ } .