'Sworn' in the Bible

Again, ye have heard that it has been said to the ancients, Thou shalt not forswear thyself, but shalt render to the Lord what thou hast sworn.

Being therefore a prophet, and knowing that God had sworn to him with an oath, of the fruit of his loins to set upon his throne;

For we enter into the rest who have believed; as he said, As I have sworn in my wrath, If they shall enter into my rest; although the works had been completed from the foundation of the world.

(for they are become priests without the swearing of an oath, but he with the swearing of an oath, by him who said, as to him, The Lord has sworn, and will not repent of it, Thou art priest for ever according to the order of Melchisedec;)