Behold, I am about to die: Behold here emphasizes the nearness of Jacob’s death; and it is followed by an exhortation of assurance to Joseph. Good News Translation expresses it “As you see.”
With you: you is plural, as Jacob may be speaking to Joseph and his sons. However, in light of the next clause, it may refer to Joseph and his brothers. The expression means that God will “help you,” “protect you,” “guide you.”
And will bring you again to the land of your fathers: that is, “God will take you [plural] back” or “God will return you [plural] to….” Your [plural] fathers means “your ancestors.”
Quoted with permission from Reyburn, William D. and Fry, Euan McG. A Handbook on Genesis. (UBS Helps for Translators). New York: UBS, 1997. For this and other handbooks for translators see here .
