After prophesying Samson's rise, Jacob pauses. The next verse in Genesis 49 is almost a sigh. "For Thy salvation have I waited, O Lord." Targum Pseudo-Jonathan unpacks the grief and the hope inside that line.
"When Jakob saw Gideon bar Joash and Shimshon bar Manovach, who were established to be deliverers, he said, I expect not the salvation of Gideon, nor look I for the salvation of Shimshon; for their salvation will be the salvation of an hour; but for Thy salvation have I waited, and will look for, O Lord; for Thy salvation is the salvation of eternity" (Genesis 49:18).
Jacob sees the whole conveyor belt of Jewish heroes. Gideon will defeat Midian with three hundred men (Judges 7). Samson will break the Philistines. Each victory will be real. Each victory will be temporary. Jacob names the pattern without bitterness — "the salvation of an hour" — and then turns his eyes past every judge, every king, every partial deliverance, and asks for something more.
Purqanaq — Your salvation — the redemption from the Holy One directly, which the tradition identifies with the days of the Meshiha and the world to come. Jacob dies looking past the hills of history to the horizon where redemption never rolls back.