O you who believe! When you go forth (to war) in God’s cause, investigate with care until the situation becomes fully clear to you, and do not say to anyone who offers you (the greeting of) peace (thereby indicating his being a Muslim), "You are not a believer," seeking the fleeting gains of the present, worldly life; for with God are gains abundant. Even thus (as he now is) were you before (ignorant of faith and what being a Muslim is, and you too entered Islam with a similar word); but God has since then been gracious to you. So investigate with care until the situation becomes fully clear to you. Surely God is fully aware of all that you do.