Deuteronomy 33:18-19 - Moses' Blessing.

Zebulun and Issachar, the two last sons of Leah, are taken together by Moses; and Zebulun, though the younger son, is placed first, in accordance with Genesis 49:13 . Success in enterprise, and felicity at home, are assured to both. "Although 'going out' (enterprise, labor) is attributed to Zebulun, and 'remaining in tents' (the comfortable enjoyment of life) to Issachar, in accordance with the delineation of their respective characters in the blessing of Jacob, this is to be attributed to the poetic parallelism of the clauses, and the whole is to be understood as applying to both in the sense suggested by Graf, 'Rejoice, Zebulun and Issachar, in your labor and your rest'" (Keil). They shall call the people unto the mountain; rather, they shall call nations to the mountain , i . e . the mountain of the Lord's inheritance ( Exodus 15:17 ), the place of his sanctuary. Sacrifices of righteousness ; i . e . sacrifices offered according to God's Law, and in a manner and a spirit well pleasing to him ( Psalms 4:6 ; 51:21). They shall suck of the abundance of the seas , etc. The treasures of both sea and land should be theirs. The Targumist Jonathan Ben Uzziel explains this as referring especially to the obtaining of the rich purple dye from the shell of the oyster ( murex Syrius ), and the producing of mirrors and glass vases from the sand. The existence of vitreous sand on the coast of Zebulun is attested both by Strabo and Pliny.