Hebrews 6:8-18 WBT

8 But that which beareth thorns and briers [is] rejected, and [is] nigh to cursing; whose end [is] to be burned.
9 But, beloved, we are persuaded better things of you, and things that accompany salvation, though we thus speak.
10 For God [is] not unrighteous to forget your work and labor of love, which ye have shown towards his name, in that ye have ministered to the saints, and do minister.
11 And we desire every one of you to show the same diligence to the full assurance of hope to the end:
12 That ye be not slothful, but followers of them who through faith and patience inherit the promises.
13 For when God made promise to Abraham, because he could swear by no greater, he swore by himself,
14 Saying, Surely blessing I will bless thee, and multiplying I will multiply thee.
15 And so, after he had patiently endured, he obtained the promise.
16 For men verily swear by the greater: and an oath for confirmation [is] to them an end of all contradiction.
17 Wherein God, willing more abundantly to show to the heirs of promise the immutability of his counsel, confirmed [it] by an oath:
18 That by two immutable things, in which [it was] impossible for God to lie, we might have a strong consolation, who have fled for refuge to lay hold upon the hope set before us: