ONLY DURING HOSTILITIES IN PROGRESS
the Holy Qur'an

And slay them wherever ye catch them, and turn them out from where they have Turned you out; for tumult and oppression are worse than slaughter; but fight them not at the Sacred Mosque, unless they (first) fight you there; but if they fight you, slay them. Such is the reward of those who suppress faith. (2:191)

They but wish that ye should reject Faith, as they do, and thus be on the same footing (as they): But take not friends from their ranks until they flee in the way of God (From what is forbidden). But if they turn renegades, seize them and slay them wherever ye find them; and (in any case) take no friends or helpers from their ranks;- (4:89)

Others you will find that wish to gain your confidence as well as that of their people: Every time they are sent back to temptation, they succumb thereto: if they withdraw not from you nor give you (guarantees) of peace besides restraining their hands, seize them and slay them wherever ye get them: In their case We have provided you with a clear argument against them. (4:91)

The (selfish) soul of the other led him to the murder of his brother: he murdered him, and became (himself) one of the lost ones. (5:33)

And fight them on until there is no more tumult or oppression, and there prevail justice and faith in God altogether and everywhere; but if they cease, verily God doth see all that they do. (8:39)

If ye gain the mastery over them in war, disperse, with them, those who follow them, that they may remember. (8:57)

But when the forbidden months are past, then fight and slay the Pagans wherever ye find them, an seize them, beleaguer them, and lie in wait for them in every stratagem (of war); but if they repent, and establish regular prayers and practise regular charity, then open the way for them: for God is Oft-forgiving, Most Merciful. (9:5)

But if they violate their oaths after their covenant, and taunt you for your Faith,- fight ye the chiefs of Unfaith: for their oaths are nothing to them: that thus they may be restrained. (9:12)

End of Quotes