Numbers 7:2
"That the princes of Israel, heads of the house of their fathers, who were the princes of the tribes, and were over them that were numbered, offered:"
Cross References (ranked by relevance)
2 Chronicles 35:8
And his princes gave willingly unto the people, to the priests, and to the Levites: Hilkiah and Zechariah and Jehiel, rulers of the house of God, gave unto the priests for the passover offerings two thousand and six hundred small cattle, and three hundred oxen.
Exodus 35:27
And the rulers brought onyx stones, and stones to be set, for the ephod, and for the breastplate;