Genesis 29:29 identifies Bilhah as Rachel's handmaid given to Jacob — providing the background needed to understand who the sons of Bilhah are here.

Genesis 30:4 introduces Bilhah as Rachel's maid who bears Dan — establishing the same Bilhah whose sons (including Dan and Naphtali) are among Joseph's companions here.

In Genesis 30:9, Leah gives Zilpah to Jacob as a wife. Zilpah's sons (Gad and Asher) are among the brothers Joseph pastures with and reports on.

Genesis 35:25 identifies the sons of Bilhah as Dan and Naphtali — the very companions mentioned in this verse who were with Joseph when he reported on his brothers.

Genesis 35:26 identifies the sons of Zilpah as Gad and Asher — the other group with whom Joseph was keeping company and reporting on.

Genesis 41:46 states Joseph was thirty when he entered Pharaoh's service — establishing that thirteen years passed from his teenage shepherding days to his rise in Egypt.

Genesis 2:4 uses the same 'generations of' formula, marking another major section of the toledot structure that organizes Genesis's genealogical narrative.

Genesis 5:1 is another instance of the 'generations of' toledot formula, this time introducing Adam's line — a structural parallel in how Genesis organizes its genealogical sections.

Genesis 6:9 uses the same 'generations of' formula to introduce Noah's line, another structural toledot marker organizing Genesis's genealogical narrative.

Genesis 10:1 is another 'generations of' toledot formula, this time introducing the nations after the flood — a structural parallel in Genesis's literary organization.

Genesis 47:28 records Jacob living 17 years in Egypt — echoing Joseph's age of 17 here, the number bookends the entire Joseph narrative.