Commentary for Genesis 46:30

אמותה הפעם NOW, I WILL FAIN DIE — It's literal meaning is as the Targum renders it. A Midrashic explanation is (being based upon the literal translation. “I will die this once”): I had thought that I would die two deaths, in this world and also in the world to come, because the Divine Presence departed from me and I therefore thought that God would hold me responsible for your death. Now, since you are alive I will die only once, in this world (Midrash Tanchuma, Vayigash 9).

אמותה הפעם, I have been saved from all my other afflictions only in order to experience new troubles afterwards. This time, I pray that I will be spared any more troubles during the rest of my life.

ויאמר …אמותה הפעם, He said:.."now I can die, etc." The reason Jacob said "now" is that he had expressed fears of dying on a previous occasion when he heard about Joseph's disappearance.