Numbers 2:14 Midrash

וְמַטֵּ֖ה גָּ֑ד וְנָשִׂיא֙ לִבְנֵ֣י גָ֔ד אֶלְיָסָ֖ף בֶּן־רְעוּאֵֽל׃

and the tribe of Gad; the prince of the children of Gad being Eliasaph the son of Reuel,

Read midrashic interpretation of Numbers 2:14: and classical rabbinic exegesis.