'Swear Falsely' in the Bible

“And though they say, ‘As the Lord lives,’Surely they swear [their oaths] falsely.”

Will you steal, murder, commit adultery, swear [oaths] falsely, offer sacrifices or burn incense to Baal, and follow after other gods that you have not known,

“Again, you have heard that it was said to the men of old, ‘You shall not make false vows, but you shall fulfill your vows to the Lord [as a religious duty].’