Verses with the word deadly in the Old Testament (3 verses):
1 Samuel 5:11
So they sent and gathered together all the lords of the Philistines, and said, Send away the ark of the God of Israel, and let it go again to his own place, that it slay us not, and our people: for there was a deadly destruction throughout all the city; the hand of God was very heavy there.
Psalms 17:9
From the wicked that oppress me, from my deadly enemies, who compass me about.
Ezekiel 30:24
And I will strengthen the arms of the king of Babylon, and put my sword in his hand: but I will break Pharaoh's arms, and he shall groan before him with the groanings of a deadly wounded man.
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