But when the prohibited (four) months (when no attack on the breakers of the treaties was permissible) have expired, slay such polytheists (who broke their treaties) wherever you find them and capture them and besiege them and lie in wait for them in every place from which it is possible to perceive the enemy and watch their movements. But if they turn in repentance and keep up Prayer and go on presenting the Zakât, leave their path free. Indeed, Allâh is Great Protector, Ever Merciful.