'As the Lord Lives' in the Bible

David answered Rechab and Baanah his brother, the sons of Rimmon the Beerothite, and said to them, "As the LORD lives, who has redeemed my soul out of all adversity,

David's anger was greatly kindled against the man, and he said to Nathan, "As the LORD lives, the man who has done this is worthy to die.

Then she said, "Please let the king remember the LORD your God, that the avenger of blood destroy not any more, lest they destroy my son." He said, "As the LORD lives, not one hair of your son shall fall to the ground."

Ittai answered the king, and said, "As the LORD lives, and as my lord the king lives, surely in what place my lord the king shall is, whether for death or for life, even there also will your servant be."