'Swear by the Lord' in the Bible

I will make you swear by the LORD, the God of heaven and the God of the earth, that you shall not take a wife for my son of the daughters of the Canaanites, among whom I live.

Now therefore arise, go out, and speak to comfort your servants; for I swear by the LORD, if you do not go out, not a man will stay with you this night. That would be worse to you than all the evil that has happened to you from your youth until now."

those who worship the host of heaven on the housetops, those who worship and swear by the LORD and also swear by Malcam,