In Genesis 44:20, Judah describes Benjamin as the only child left of his mother—this echoes the two-sons statement and explains the father's attachment.

Genesis 29:18-21 describes Jacob's love for Rachel and his seven years of work — the wife who later bore Joseph and Benjamin, referenced here.

Genesis 29:28 recounts Jacob's marriage to Rachel — the wife who bore the two sons mentioned in 44:27.

Genesis 30:22-25 tells of Rachel giving birth to Joseph, the first of the two sons Jacob refers to in 44:27.

Genesis 35:16-18 records Benjamin's birth and Rachel's death — the second son Jacob mentions in 44:27.

Genesis 46:19 lists Rachel's sons as Joseph and Benjamin — exactly the two sons Jacob refers to in 44:27.

Genesis 35:18 records Rachel dying as she gives birth to Benjamin—the same 'wife' who bore the two sons, linking her death to the narrative.

Genesis 42:38 has Jacob saying losing Benjamin would kill him—reinforcing the high stakes for the second son born to Rachel.

In Genesis 42:4, Jacob refuses to send Benjamin for fear of harm—this shows his protective concern for the remaining son of the two.

In Genesis 29:30, Jacob loves Rachel more than Leah—this identifies the wife who bore the two sons (Joseph and Benjamin) mentioned here.