Hebrews 6:16-18

Young's Literal Translation

¹⁶ for men indeed do swear by the greater, and an end of all controversy to them for confirmation [is] the oath,

¹⁷ in which God, more abundantly willing to shew to the heirs of the promise the immutability of his counsel, did interpose by an oath,

¹⁸ that through two immutable things, in which [it is] impossible for God to lie, a strong comfort we may have who did flee for refuge to lay hold on the hope set before [us],