Sarah gave birth to Isaac

21 Yahweh was very kind to Sarah, just as he said he would be. He did for Sarah exactly what he promised to do. 2 She became pregnant and gave birth to a son for Abraham when he was very old, at the time God promised it would happen. 3 Abraham gave the name ‘Isaac’ (which means ‘he laughs’) to the son Sarah gave birth to. 4 Abraham circumcised his son Isaac when his son was eight days old, just as God commanded him to do. 5 Abraham was 100 years old when his son Isaac was born. 6 And Sarah said, “Although I was sad before because I did not have any children, God has now enabled me to laugh, and everyone who hears about what God has done for me will laugh with me.” 7 Then she also said, “No one would have said to Abraham that some day Sarah would nurse a child, but I have given birth to a son when Abraham is very old.”