Romans 4:18-19

Against all odds, when it looked hopeless, Abraham believed the promise and expected God to fulfill it. He took God at his word, and as a result he became the father of many nations. God’s declaration over him came to pass: “Your descendants will be so many that they will be impossible to count!” In spite of being nearly one hundred years old when the promise of having a son was made, his faith was so strong that it could not be undermined by the fact that he and Sarah were incapable of conceiving a child.