What are the connotations of "Menuchah" and "ha'Aretz"?
Rashi: "Menuchah" is referring to Yisachar's portion of land, which was blessed and fruit-producing. 1
Targum Yonasan: He saw the restfulness of Olam ha'Ba and that his portion in the land was fruitful.
What was Ya'akov referring to when he said "va'Yet Shichmo Lisbol ... "?
Rashi #2 (citing Targum Onkelos): They bent their shoulder to do battle and to conquer the towns of other nations, and the enemy that remained paid them taxes.
Rashbam: He bent his back to accept the yoke of the kings of Yisrael. 3
Seforno: When he saw the restfulness of spiritual attainment, and that his land is able to sustain him without pain, he bent his shoulder to take on the yoke of Torah and the yoke of communal leadership. 4
Riva: He accepted the yoke of working the land [for it is better than commerce; refer to 49:15:1:2 - PF].
And the restfulness of the world to come (Targum Yonasan).
At one stage, they actually provided two hundred heads of Sanhedrin (as the Pasuk records in Divrei ha'Yamim 1, 12:33), whose instructions the people followed (Rashi).
Seforno: As the Gemara says in Mo'ed Katan (6a) 'When there is a Talmid Chacham in town, all matters of communal concern are placed upon him.' The other tribes - the workers - have to 'pay' the Talmid Chacham by working for him, as the Gemara states in Yoma (72b) 'The people in the town are obligated to do the work of the Talmid Chacham.
What is l'Mas Oved?