Ge 35:27 Then Jacob came to his father Isaac at Mamre, or Kirjath Arba (that is, Hebron), where Abraham and Isaac had dwelt.

28 Now the days of Isaac were one hundred and eighty years.

29 So Isaac breathed his last and died, and was gathered to his people, being old and full of days. And his sons Esau and Jacob buried him.

Moses is showing his original Israelite readers that Jacob did make it back to his father Isaac in peace. In Genesis 28:20-21, Jacob said: "If God will be with me, and keep me in this way that I am going, and give me bread to eat and clothing to put on, so that I come back to my father's house in peace, then the LORD shall be my God."

Now, just as Jacob promised that if God would bring him back in the land, back into his father's house, that God would be his God, so Israel must follow Jacob's example. God is bringing them back into the land of their fathers, now, they must acknowledge and recognize God as their God. They should have no other gods but Him.