Genesis 35:28

And the days of Isaac were an hundred and fourscore years.

Cross-references

Genesis 25:7 records Abraham's lifespan using the same formula — both verses mark patriarchal deaths with their age.

Genesis 47:28 records Jacob's age (147) the same way — Isaac's 180 years here is the standard Jacob later says he didn't reach.

Genesis 25:8 describes Abraham dying 'full of years' — here Isaac's 180 years completes a similarly full life.

Genesis 47:9 explicitly references Isaac's days — Jacob tells Pharaoh his 130 years 'have not attained' his fathers' lifespan.

Genesis 50:26 records Joseph's death at 110 — continuing the Genesis pattern of noting lifespan, though a generation removed.