TSK · Hebrews 2:16

The book of the genealogy of Jesus Christ, the son of David, the son of Abraham.

For this cause it is of faith, that it may be according to grace, to the end that the promise may be sure to all the seed, not to that only which is of the law, but to that also which is of the faith of Abraham, who is the father of us all.

If you are Christ's, then you are Abraham's seed and heirs according to promise.

For they indeed, for a few days, punished us as seemed good to them; but he for our profit, that we may be partakers of his holiness.