'Swear Falsely' in the Bible
You must not swear falsely by My name, profaning the name of your God; I am Yahweh.
And though they say, The LORD liveth; surely they swear falsely.
Will ye steal, murder, and commit adultery, and swear falsely, and burn incense unto Baal, and walk after other gods whom ye know not;
“I will come to you in judgment, and I will be ready to witness against sorcerers and adulterers; against those who swear falsely; against those who oppress the widow and the fatherless, and cheat the wage earner; and against those who deny justice to the foreigner. They do not fear Me,” says the Lord of Hosts.