וַיַּקְרִ֙יבוּ֙ נְשִׂיאֵ֣י יִשְׂרָאֵ֔ל רָאשֵׁ֖י בֵּ֣ית אֲבֹתָ֑ם הֵ֚ם נְשִׂיאֵ֣י הַמַּטֹּ֔ת הֵ֥ם הָעֹמְדִ֖ים עַל־הַפְּקֻדִֽים׃
that the princes of Israel, the heads of their fathers’houses, offered—these were the princes of the tribes, these are they that were over them that were numbered.
Read kabbalistic (mystical) interpretation of Numbers 7:2: and classical mystical sources.