'As the Lord Lives' in the Bible

Then the army told Saul, "Shall Jonathan die, who brought about this great deliverance in Israel? As the LORD lives, not one hair of his head will fall to the ground, because today he did this with God's help."

Then I'll send a servant, saying, "Go, find the arrows.' If I specifically say to the servant, "Look, the arrows are on this side of you, get them,' then come out because it's safe for you, and, as surely as the LORD lives, there is no danger.

Now, your majesty, as the LORD lives and as you live, the LORD has kept you from shedding blood and from delivering yourself by your own actions. Now, may your enemies and those seeking to do evil to your majesty be like Nabal.

As the LORD lives, the LORD will strike him down, or his time will come to die, or he will go into battle and perish.

This thing that you did is not good. As the LORD lives, you deserve to die, you who didn't guard your lord, the LORD's anointed. Where is the king's spear and where is the jug of water that was at his head?"

Saul swore to her by the LORD: "As surely as the LORD lives, no punishment will come on you for this thing."

Then Achish summoned David and told him, "As surely as the LORD lives, you are trustworthy, and it seems good to me for you to campaign with me as part of the army. Indeed, I've not found any evil in you from the time you came to me until now. But the leaders don't approve of you.