'Oath' in the Bible

Then the king swore an oath and said, “As the Lord lives, who has redeemed my soul from all distress,

Why then have you not kept the oath of the Lord, and the command which I gave you?”

“If a man sins against his neighbor and is made to take an oath [of innocence] and he comes to take the oath before Your altar in this house (temple),

As the Lord your God lives, there is no nation or kingdom where my master has not sent messengers to seek you; and when they said, ‘He is not here,’ Ahab made the kingdom or nation swear that they had not found you.