Everyone reckoned that Abraham was too old to have any kids, but he remembered the word God that told him. God said that he will have kids and his family to come will grow to be a really big mob. Abraham kept on believing God and waited for God to do this, just like he promised. Abraham didn’t think about his old body. It was so old it was nearly dead. He was about 100 years old. And Sarah, his wife, she was also too old to have a baby. But Abraham kept on believing anyway.