Hebrews 6:9-13

But, beloved, we are persuaded better things of you, and things that accompany salvation, though we thus speak: for God is not unrighteous to forget your work and the love which ye showed toward his name, in that ye ministered unto the saints, and still do minister. And we desire that each one of you may show the same diligence unto the fulness of hope even to the end: that ye be not sluggish, but imitators of them who through faith and patience inherit the promises. For when God made promise to Abraham, since he could swear by none greater, he sware by himself