{ There is no compulsion in religion; sensible conduct has been made clear from error } Al-baqara 256

His word: { There is no compulsion in religion } ; this came down concerning an Ansar man of the Banu Salim ibn ‘Awf, known as Al-Husaini; he had two Christian sons but he was a Muslim man. He said to the Prophet (SAW): Shall I not compel them? For indeed they only accept Christianity. So Allah sent this down regarding him; Ibn Juraij related it and Al-Suddi related something similar, except he added: The two of them had become Christians because of some merchants who had come from Al-Sham carrying oil. And when the two of them made up their mind to go with them, their father wanted to compel them, and he asked the Messenger of Allah (SAW) to send people after them, but this verse came down. … A large group of scholars hold the view that this verse pertains to the People of the Book, and those who entered their religion before the abrogation and modification, provided they fulfill the jizya. Others say, rather, that this verse is abrogated by the verse of fighting, and indeed all nations must be called to enter the true religion, the religion of Islam. If any of them refuses to enter it, not having criticized it, or fulfilled the jizya, he is to be fought until he is killed; this is the meaning of compulsion. Allah Most High said: { You will be called to a people of great might, to fight them or they yield } [Al-fath 16]; and the Most High said: { Oh Prophet! Wage jihad on the Disbelievers and the hypocrites, and be harsh to them } [Al-tahrim 9]; and the Most High said: { Oh you who have believed! Fight the Disbelievers who are near to you, and may they find harshness in you; and know that Allah is with the devout } [Al-tawba 123]; and in sahih hadiths: “Our Lord will marvel at people who are led to Jannah in chains”, that is, prisoners brought by the people of Islam in a tight grip, shackles, chains, and handcuffs, then after this they yield into Islam and their deeds and their intentions are put in order, and they become among those who will be in Jannah.