Hebrews 11:8-12
8 “By faith Abraham, when he was called, obeyed by going out to a place which he was to receive for an inheritance; and he left, not knowing where he was going. 9 By faith he lived as a stranger in the land of promise, as in a foreign land, living in tents with Isaac and Jacob, fellow heirs of the same promise; 10 for he was looking for the city which has foundations, whose architect and builder is God. 11 By faith even Sarah herself received ability to conceive, even beyond the proper time of life, since she considered Him faithful who had promised. 12 Therefore even from one man, and one who was as good as dead at that, there were born descendants who were just as the stars of heaven in number, and as the innumerable grains of sand along the seashore.”’
The author shows that Abraham and Sarah lived by faith in God before the law existed. Everything they did was done in faith. The faith was ultimately in God’s promise to give Abraham descendants as numerous as the seashore. These descendants were ultimately spiritual children through Christ.
