Adam Clarke on Genesis 49:13

Zebulun's lot or portion in the division of the Promised Land extended from the Mediterranean Sea on the west, to the lake of Gennesareth on the east; see his division, Jos 19:10, etc. The Targum of Jonathan ben Uzziel paraphrases the passage thus: "Zebulun shall be on the coasts of the sea, and he shall rule over the havens; he shall subdue the provinces of the sea with his, ships, and his border shall extend unto Sidon.

14. Issachar is a strong ass Couching between two burdens.

15. And he saw the resting place that it was good, And the land that it was pleasant; And he inclined his shoulder to the load, And he became a servant unto tribute.