When the time of the death of Abu Talib approached, Messenger of Allah ﷺ went to him and found Abu Jahl bin Hisham and ʿAbdullah bin Abi Umaiya bin Al-Mughira by his side. Messenger of Allah ﷺ said to Abu Talib, "O uncle! Say: None has the right to be worshipped but Allah, a sentence with which I shall be a witness (i.e. argue) for you before Allah. Abu Jahl and ʿAbdullah bin Abi Umaiya said, "O Abu Talib! Are you going to denounce the religion of ʿAbdul Muttalib?" Messenger of Allah ﷺ kept on inviting Abu Talib to say it (i.e. 'None has the right to be worshipped but Allah') while they (Abu Jahl and ʿAbdullah) kept on repeating their statement till Abu Talib said as his last statement that he was on the religion of ʿAbdul Muttalib and refused to say, 'None has the right to be worshipped but Allah.' (Then Messenger of Allah ﷺ said, "I will keep on asking Allah's forgiveness for you unless I am forbidden (by Allah) to do so." So Allah revealed (the verse) concerning him (i.e. It is not fitting for the Prophet ﷺ and those who believe that they should invoke (Allah) for forgiveness for pagans even though they be of kin, after it has become clear to them that they are companions of the fire (9.113).  

أَنَّهُ لَمَّا حَضَرَتْ أَبَا طَالِبٍ الْوَفَاةُ جَاءَهُ رَسُولُ اللَّهِ ﷺ فَوَجَدَ عِنْدَهُ أَبَا جَهْلِ بْنَ هِشَامٍ وَعَبْدَ اللَّهِ بْنَ أَبِي أُمَيَّةَ بْنِ الْمُغِيرَةِ قَالَ رَسُولُ اللَّهِ ﷺ لأَبِي طَالِبٍ يَا عَمِّ قُلْ لاَ إِلَهَ إِلاَّ اللَّهُ كَلِمَةً أَشْهَدُ لَكَ بِهَا عِنْدَ اللَّهِ فَقَالَ أَبُو جَهْلٍ وَعَبْدُ اللَّهِ بْنُ أَبِي أُمَيَّةَ يَا أَبَا طَالِبٍ أَتَرْغَبُ عَنْ مِلَّةِ عَبْدِ الْمُطَّلِبِ فَلَمْ يَزَلْ رَسُولُ اللَّهِ ﷺ يَعْرِضُهَا عَلَيْهِ وَيَعُودَانِ بِتِلْكَ الْمَقَالَةِ حَتَّى قَالَ أَبُو طَالِبٍ آخِرَ مَا كَلَّمَهُمْ هُوَ عَلَى مِلَّةِ عَبْدِ الْمُطَّلِبِ وَأَبَى أَنْ يَقُولَ لاَ إِلَهَ إِلاَّ اللَّهُ فَقَالَ رَسُولُ اللَّهِ ﷺ أَمَا وَاللَّهِ لأَسْتَغْفِرَنَّ لَكَ مَا لَمْ أُنْهَ عَنْكَ فَأَنْزَلَ اللَّهُ تَعَالَى فِيهِ {مَا كَانَ لِلنَّبِيِّ} الآيَةَ  

That Al-Miqdad bin ʿAmr Al-Kindi, who was an ally of Bani Zuhra and one of those who fought the battle of Badr together with Messenger of Allah ﷺ told him that he said to Messenger of Allah ﷺ, "Suppose I met one of the infidels and we fought, and he struck one of my hands with his sword and cut it off and then took refuge in a tree and said, "I surrender to Allah (i.e. I have become a Muslim),' could I kill him, O Messenger of Allah ﷺ, after he had said this?" Messenger of Allah ﷺ said, "You should not kill him." Al- Miqdad said, "O Messenger of Allah ﷺ! But he had cut off one of my two hands, and then he had uttered those words?" Messenger of Allah ﷺ replied, "You should not kill him, for if you kill him, he would be in your position where you had been before killing him, and you would be in his position where he had been before uttering those words."  

أَنَّهُ قَالَ لِرَسُولِ اللَّهِ ﷺ أَرَأَيْتَ إِنْ لَقِيتُ رَجُلاً مِنَ الْكُفَّارِ فَاقْتَتَلْنَا فَضَرَبَ إِحْدَى يَدَىَّ بِالسَّيْفِ فَقَطَعَهَا ثُمَّ لاَذَ مِنِّي بِشَجَرَةٍ فَقَالَ أَسْلَمْتُ لِلَّهِ آأَقْتُلُهُ يَا رَسُولَ اللَّهِ بَعْدَ أَنْ قَالَهَا فَقَالَ رَسُولُ اللَّهِ ﷺ لاَ تَقْتُلْهُ فَقَالَ يَا رَسُولَ اللَّهِ إِنَّهُ قَطَعَ إِحْدَى يَدَىَّ ثُمَّ قَالَ ذَلِكَ بَعْدَ مَا قَطَعَهَا فَقَالَ رَسُولُ اللَّهِ ﷺ لاَ تَقْتُلْهُ فَإِنْ قَتَلْتَهُ فَإِنَّهُ بِمَنْزِلَتِكَ قَبْلَ أَنْ تَقْتُلَهُ وَإِنَّكَ بِمَنْزِلَتِهِ قَبْلَ أَنْ يَقُولَ كَلِمَتَهُ الَّتِي قَالَ  

Messenger of Allah ﷺ sent us towards Al-Huruqa, and in the morning we attacked them and defeated them. I and an Ansari man followed a man from among them and when we took him over, he said, "La ilaha illal-Lah." On hearing that, the Ansari man stopped, but I killed him by stabbing him with my spear. When we returned, the Prophet ﷺ came to know about that and he said, "O Usama! Did you kill him after he had said "La ilaha ilal-Lah?" I said, "But he said so only to save himself." The Prophet ﷺ kept on repeating that so often that I wished I had not embraced Islam before that day.  

بَعَثَنَا رَسُولُ اللَّهِ ﷺ إِلَى الْحُرَقَةِ فَصَبَّحْنَا الْقَوْمَ فَهَزَمْنَاهُمْ وَلَحِقْتُ أَنَا وَرَجُلٌ مِنَ الأَنْصَارِ رَجُلاً مِنْهُمْ فَلَمَّا غَشِينَاهُ قَالَ لاَ إِلَهَ إِلاَّ اللَّهُ فَكَفَّ الأَنْصَارِيُّ فَطَعَنْتُهُ بِرُمْحِي حَتَّى قَتَلْتُهُ فَلَمَّا قَدِمْنَا بَلَغَ النَّبِيَّ ﷺ فَقَالَ يَا أُسَامَةُ أَقَتَلْتَهُ بَعْدَ مَا قَالَ لاَ إِلَهَ إِلاَّ اللَّهُ قُلْتُ كَانَ مُتَعَوِّذًا فَمَا زَالَ يُكَرِّرُهَا حَتَّى تَمَنَّيْتُ أَنِّي لَمْ أَكُنْ أَسْلَمْتُ قَبْلَ ذَلِكَ الْيَوْمِ