It is narrated from Sa'id bin Jubair (may Allah have mercy on him) regarding the statement of Allah the Exalted: ﴿There is no compulsion in religion﴾, that he said: This verse was revealed about the Ansar. I asked: "Specifically for them?" He said: "Yes, specifically for them." Because among the Ansar, when a woman had few children or was barren, she would vow that if she had a child, she would give him to the Jews so that his life would be prolonged. When Islam came, there were such children among the Ansar who were with the Jews. Then, when Banu Nadir were exiled, the Ansar said: "O Messenger of Allah (peace and blessings be upon him)! Our sons and brothers are with them?" So the Messenger of Allah (peace and blessings be upon him) remained silent, then this verse was revealed: ﴿There is no compulsion in religion﴾. So the Messenger of Allah (peace and blessings be upon him) said: "Your companions have been given the choice; if they choose you, they will be among you, and if they choose them, then send them with them."