Verse 20 states Levites were over treasures generally; this verse specifies that Jehieli's sons held that office, giving a concrete example.

1 Chronicles 23:8 lists Jehiel, Zetham, and Joel as sons of Laadan—this verse names Zetham and Joel as sons of Jehieli, identifying them.

1 Chronicles 29:8 has Jehiel the Gershonite giving precious stones to the temple treasury—here his sons are in charge of that same treasury.

1 Chronicles 9:28 shows Levites counting temple utensils — the same kind of treasury oversight Jehiel's sons are given here.