Hebrews 6:8-18 WNT

8 But if it only yields a mass of thorns and briers, it is considered worthless, and is in danger of being cursed, and in the end will be destroyed by fire.
9 But we, even while we speak in this tone, have a happier conviction concerning you, my dearly-loved friends--a conviction of things which point towards salvation.
10 For God is not unjust so that He is unmindful of your labour and of the love which you have manifested towards Himself in having rendered services to His people and in still rendering them.
11 But we long for each of you to continue to manifest the same earnestness, with a view to your enjoying fulness of hope to the very End;
12 so that you may not become half-hearted, but be imitators of those who through faith and patient endurance are now heirs to the promises.
13 For when God gave the promise to Abraham, since He had no one greater to swear by, He swore by Himself,
14 saying, "Assuredly I will bless you and bless you, I will increase you and increase you."
15 And so, as the result of patient waiting, our forefather obtained what God had promised.
16 For men swear by what is greater than themselves; and with them an oath in confirmation of a statement always puts an end to a dispute.
17 In the same way, since it was God's desire to display more convincingly to the heirs of the promise how unchangeable His purpose was,
18 He added an oath, in order that, through two unchangeable things, in which it is impossible for Him to prove false, we may possess mighty encouragement--we who, for safety, have hastened to lay hold of the hope set before us.