Sarah had become very old and had no more hope to ever become pregnant. But God had promised Abraham to show him mercy. When God finally gave them a son they named him “Isaac”. God had fulfilled his promise made to Abraham many years earlier which said God would greatly multiply Abraham’s descendant. God had wanted to test Abraham’s faith and obedience, so he even told him to sacrifice his only dear son Isaac. Abraham humbly accepted God’s will. When he was about to use his knife to sacrifice Isaac, God stopped him and instead sent a ram to Abraham as a substitute sacrifice for Isaac.