'Swear' in the Bible

Now it was told Solomon, saying, “Behold, Adonijah is afraid of King Solomon, for behold, he has taken hold of the horns of the altar, saying, ‘Let King Solomon swear to me today that he will not put his servant to death with the sword.’”

So the king sent and called for Shimei and said to him, “Did I not make you swear by the Lord and solemnly warn you, saying, ‘You will know for certain that on the day you depart and go anywhere, you shall surely die’? And you said to me, ‘The word which I have heard is good.’

As the Lord your God lives, there is no nation or kingdom where my master has not sent to search for you; and when they said, ‘He is not here,’ he made the kingdom or nation swear that they could not find you.