Surrender is mentioned in the Quran in these verses:
[2:85] Yet, here you are killing each other, and evicting some of you from their homes, banding against them sinfully and maliciously. Even when they surrendered, you demanded ransom from them. Evicting them was prohibited for you in the first place. Do you believe in part of the scripture and disbelieve in part? What should be the retribution for those among you who do this, except humiliation in this life, and a far worse retribution on the Day of Resurrection? God is never unaware of anything you do.
[47:35] Therefore, you shall not waver and surrender in pursuit of peace, for you are guaranteed victory, and God is with you. He will never waste your efforts.
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