2 Kings 6 v 20 And it came to pass, when they were come into Samaria, that Elisha said, LORD, open the eyes of these men, that they may see. And the LORD opened their eyes, and they saw; and, behold, they were in the midst of Samaria. 21 And the king of Israel said unto Elisha, when he saw them, My father, shall I smite them? shall I smite them? 22 And he answered, Thou shalt not smite them: wouldest thou smite those whom thou hast taken captive with thy sword and with thy bow? set bread and water before them, that they may eat and drink, and go to their master. 23 And he prepared great provision for them: and when they had eaten and drunk, he sent them away, and they went to their master. So the bands of Syria came no more into the land of Israel.
[8.17] So you did not slay them, but it was Allah Who slew them, and you did not smite when you smote (the enemy), but it was Allah Who smote, and that He might confer upon the believers a good gift from Himself; surely Allah is Hearing, Knowing.
Allah expects Muslims to do battle with those who do not believe what they believe, or enjoin what he enjoins, and to smite their necks, i.e. to cut their heads off, just as ISIS are doing to Christians:
[47.4] So when you meet in battle those who disbelieve, then smite the necks until you have overcome them, then make (them) prisoners, and afterwards either set them free as a favor or let them ransom (themselves) until the war terminates. That (shall be so); and if Allah had pleased He would certainly have exacted what is due from them, but that He may try some of you by means of others; and (as for) those who are slain in the way of Allah, He will by no means allow their deeds to perish.
Or smite them with Sharia:
[5.33] The punishment of those who wage war against Allah and His apostle and strive to make mischief in the land is only this, that they should be murdered or crucified or their hands and their feet should be cut off on opposite sides or they should be imprisoned; this shall be as a disgrace for them in this world, and in the hereafter they shall have a grievous chastisement,
Or kill them, enslave them or hold them to ransom, see Islam Q and A:
Prisoners should be detained until it is decided what is the best move. The ruler of the Muslims should detain prisoners until he decides what is in the Muslims’ best interests. He may ransom them for money, or exchange them for Muslim prisoners, or release them for nothing in return, or distribute them among the Muslims as slaves, or kill the men, but not the women and children, because the Prophet (peace and blessings of Allaah be upon him) forbade killing the latter. The purpose behind detaining prisoners is so that the Muslims may be protected from their evil. The Prophet (peace and blessings of Allaah be upon him) used to enjoin the Muslims to treat prisoners well, whereas the Romans and those who came before them the Assyrians and Pharaohs, all used to put out their prisoners’ eyes with hot irons, and flay them alive, feeding their skins to dogs, such that the prisoners preferred death to life.
What does the bible say:
Thou shalt not covet, thou shalt not kill, thou shalt not steal. Elisha correctly understood what the law of Moses prohibited men from doing to other men, regardless of what they believe or what god they worship.