1 Kings 18:10

As the Lord thy God liveth
Which is the form of an oath he thought fit to make, to ascertain the truth of what he was about to say: there is no nation or kingdom, whither my lord hath not sent to seek
thee;
which is either an hyperbolical expression, signifying he had sought for him in many places, and in every place he could think of; or it must be understood either of the ten tribes, which were as so many nations and kingdoms as they had been; or were more in the times of the Canaanites; or of the nations round about, that were in alliance with or tributary to the king of Israel: and when they said, he is not there, he took an oath of the kingdom and
nation that they found thee not;
which he might exact of his own subjects, but could not of other nations, unless they were free to it of themselves; or he might take it of their ambassadors or merchants that came into his land, of whom he inquired, and adjured them to tell him the truth.