Matthew 5:33-35

“You have heard that it was said to our people long ago, ‘Don’t break your promises, but keep the promises you make to the Lord.’ But I tell you, never swear an oath. Don’t swear an oath using the name of heaven, because heaven is God’s throne. Don’t swear an oath using the name of the earth, because the earth belongs to God. Don’t swear an oath using the name of Jerusalem, because that is the city of the great King.