English: “And the sons of Dan: Chushim” — even though only one son is named, the verse writes “sons” in the plural, in the pattern of the other tribes.
On the daf / in context: Part of the seventy-soul list; the plural form is noted despite the single named son.
Type of Learning
Derash on the verse (midrashic genealogy) — not a formal named middah of the 13.
What Is Learned
Dan’s contribution to the seventy is represented by his son Chushim, listed in the plural pattern of the other tribes.