[83] When Abu Tālib, the Prophet’s uncle, died as a disbeliever, the Prophet (ﷺ) said: “By Allah, I shall keep on asking for forgiveness for you, unless I am told to cease!” Then this verse was revealed. [Al-Bukhārī: 3884, Muslim: 24].
[84] This prohibition is not exclusive to Islam as it has been in effect since the time of Abraham (عليه السلام)
[85] ‘Abdullah ibn ‘Umar (رضي الله عنهما) reported regarding al-Haruriyah (the kharijites) that the Prophet (ﷺ) said: "They will go out of Islam as an arrow darts out of the game’s body." [Sahih al-Bukhāri: 66]