God made a covenant with Abraham before he had any children. He took him outside and said, “Look up at the heavens and count the stars-if indeed you can count them”. Then he said to him, “So shall your offspring be.” Abraham was ninety-nine years old when God told him he would have a son. Abraham was a man of faith but laughed when he thought about being a dad at 100 years old. When Sarah heard that she was going to be a mother at her age she laughed also. God asked, “Is there anything too hard for the Lord?” God kept his promise and Abraham and Sarah had Isaac. Isaac’s name means laughter.
When God makes a promise he keeps it.
“Yet he did not waver through unbeleif regarding the promise of God, but was strengthened in his faith and gave glory to God.”
Romans 4:20