Who Was Isaac's Father? Genesis 21:1–7
Isaac's father was Abraham, and Genesis 21:1–7 says so repeatedly. The passage also frames the birth as God keeping a promise he had already spoken.
Who Was Abraham's Wife? Sarah and the Birth of Isaac
Sarah was Abraham's wife, and Genesis 21:1–7 is the account of the son born to her. The passage answers the question by showing God doing what he had spoken, at the time he had set.
Genesis 21:8–21: Hagar's Son and God's Care
Hagar's son is sent away from Abraham's household, yet God hears him in the wilderness and stays with him as he grows. Scripture places him outside the covenant line and inside God's attentive care.
Isaac's Mother: Sarah in Genesis 21
Isaac's mother was Sarah, Abraham's wife, and Genesis 21:1–7 says so plainly. The passage treats the birth less as ordinary biology than as God doing what he had said.
Isaac's Father: Abraham in Genesis 21:1–7
Isaac's father was Abraham, and Genesis 21:1–7 says so plainly. The same verses make the birth more than a family record: God kept a promise he had already spoken.