Jesus is the Son of Abraham. Matthew 1:1
Abraham was told by God that he was going to have a son at age 90. When Abraham was 100 years, his son, Isaac, was born. Abraham’s wife Sarah was 90 years when he was born. When Isaac was around 20 years old, Abraham was told by God to sacrifice his son. As Abraham was getting ready to kill Isaac, an Angel of the Lord told Abraham not to sacrifice his son, but to sacrifice the ram that was caught in the bushes. This ram was the substitute sacrifice that took Isaac’s place on the altar, just like Jesus who sacrificed Himself for us.
Life Received, Life Together, Life Giving- John 10:10
Question: Was Isaac Abraham’s only child?
Answer: Isaac was Abraham and Sarah’s only son. However, Abraham’s first child was Ishmael who was born when Abraham was 86 years old (Gen 16:16) and after Sarah died Abraham remarried and had many sons and we assume daughters. Genesis 25