Hebrews 6:17 ASV

¹⁵  And thus, having patiently endured, he obtained the promise.

¹⁶  For men swear by the greater: and in every dispute of theirs the oath is final for confirmation.

¹⁷  Wherein God, being minded to show more abundantly unto the heirs of the promise the immutability of his counsel, interposed with an oath;

¹⁸  that by two immutable things, in which it is impossible for God to lie, we may have a strong encouragement, who have fled for refuge to lay hold of the hope set before us:

¹⁹  which we have as an anchor of the soul, `a hope' both sure and stedfast and entering into that which is within the veil;