What is the significance of the word "Re'u"?
Moshav Zekenim (from B'rachos, 55a): We learn from here that before appointing a communal leader one must obtain their consent.
Da'as Zekenim, Rosh: When Moshe said that Betzalel will build the Mishkan, Yisrael murmured, and said that he is taking all the greatness for himself and his family. Moshe said, know and see that Hashem said so. Initially Moshe thought that he himself will build the Mishkan; Hashem said, no - rather, a Tzadik, Chur, who was killed [for protesting] in the episode of the Egel, his grandson will build the Mishkan, for it is an atonement for the Egel.
Who was Chur?