In context
1Yahweh took note of Sarah as he had said he would, and Yahweh did for Sarah what he had promised. 2Sarah conceived and bore Abraham a son in his old age, at the very time God had told him. 3Abraham named the son born to him, the one Sarah bore him, Isaac. 4Abraham circumcised his son Isaac when he was eight days old, as God had commanded him. 5Abraham was a hundred years old when his son Isaac was born to him.
