Targum su Deuteronomio 33:18

And Mosheh the prophet blessed the tribe of Zebulon, and said: Rejoice, O house of Zebulon, in your going forth for your commerce, and you, O house of Issakar, in the tabernacles of your schools.

Mosheh the prophet of the Lord blessed the tribe of Zebulon, and said: Rejoice, O ye of the house of Zebulon, when you go out upon your commerce; and ye of the house of Issakar, rejoice, when you come in unto your houses of learning.