Hebrews 6:16-18

New Revised Standard Version Catholic Edition

¹⁶ Human beings, of course, swear by someone greater than themselves, and an oath given as confirmation puts an end to all dispute. ¹⁷ In the same way, when God desired to show even more clearly to the heirs of the promise the unchangeable character of his purpose, he guaranteed it by an oath, ¹⁸ so that through two unchangeable things, in which it is impossible that God would prove false, we who have taken refuge might be strongly encouraged to seize the hope set before us.