Sifrei Bamidbar 52

(Bamidbar 7:18) "On the second day, Nethanel ben Tzuar, the chief of Yissachar, presented": (Ibid. 19) "He presented (hikriv) his offering": What is the intent of this (i.e., why the redundancy?) Because Reuven came and protested, saying: It is enough that Judah preceded me; let me (now) present according to the order of (precedence) in birth, Moses rebuked him, saying: The Holy One told me to present according to (precedence) in (the order of) journeying — it being written "hakrev" (imperative - "Present"). "He (Nethanel) presented his offering." Because Nethanel merited in counsel (i.e., to counsel the presentation of these offerings), Scripture accounts it to him as if he had presented first and he merited the bequest of binah (understanding) as his (Yissachar's) portion, viz. (I Chronicles 12:33) "And of the sons of Yissachar, knowers of understanding for the times," and (Judges 5:15) "And the leaders of Yissachar (the Sanhedrin) were with Devorah, and as Yissachar, so, Barak, in the valley, etc." And thus does Scripture praise him (Yissachar) in the batei-din in Egypt, viz. (of Yissachar) "Yashuv, the family of the Yashuvi, "yishuv" connoting beth-din, as in (Ezekiel 33:31) "and they will come to you as a people comes, and My people will sit (in judgment) before you," and (Devarim 33:18) "Rejoice Zevulun on your going forth (to trade), and Yissachar in your tents (of Torah)," and (Bereshit 25:27) "… and Yaakov was a "whole" man, sitting in the tents (of learning)."