Matthew Poole and continuators on Genesis 49:15

15 And he saw that rest was good, and the land that it was pleasant: and bowed his shoulder to bear, and became a servant unto tribute .

Or rather, his resting place, as this very word signifies, Gen. 8. 9. Psal. 116. 7. and 132. 8. Isa. 11. 10. (i. e.) his portion or habitation, as the Chald. and Syr. translate it. So this agrees with the following member, where, after the manner of the Hebrews, the same thing is repeated in other words. And if it be objected against this version, that it is not said his rest, but rest in the general, it may be replyed, that so it is in the following branch, the land, though it be apparently meant of his land or portion of land allotted to him. Besides the pronouns are often omitted and to be understood in the Hebrew text as may appear by comparing 1 King. 10. 7. with 2 Chron. 9. 6. and Psal. 41. 9. with Ioh. 13. 18. and Mat. 3. 12. with Luk. 3. 17.

Willingly paying whatsoever Tributes were imposed upon him either by the neighbouring Tribes or by forreign powers rather than to forfeit his pleasant and fruitful country and his sweet repose.