Even as Abraham believed God, and it was accounted to him for righteousness. Know ye therefore that they which are of faith, the same are the children of Abraham. ~ Galatians 3:6-7 KJV

Thus Abraham believed in and adhered to and trusted in and relied on God, and it was reckoned and placed to his account and credited as righteousness (as conformity to the divine will in purpose, thought, and action). [Gen. 15:6.] Know and understand that it is [really] the people [who live] by faith who are [the true] sons of Abraham. ~ Galatians 3:6-7 AMP