'As Surely As You Live' in the Bible

When Saul had seen David going out to confront the Philistine, he asked Abner the commander of the army, “Whose son is this youth, Abner?”“My king, as surely as you live, I don’t know,” Abner replied.

"Now, my lord, as surely as the Lord lives and as surely as you live, it is the Lord who has kept you from shedding blood and taking matters into your own hands. Now may your enemies and those who seek to harm my lord be like Nabal.

Uriah answered David, “The ark, Israel, and Judah are dwelling in tents, and my master Joab and his soldiers are camping in the open field. How can I enter my house to eat and drink and sleep with my wife? As surely as you live and by your life, I will not do this!”

The king asked, “Did Joab put you up to all this?”The woman answered. “As you live, my lord the king, no one can turn to the right or left from all my lord the king says. Yes, your servant Joab is the one who gave orders to me; he told your servant exactly what to say.