Shared ground
These lines are part of Moses’ final blessings, and they read like short wishes and prayers for the tribes’ future. Reuben’s words are entirely about continued existence: that the tribe would “live” and not disappear, and that its numbers would not shrink to the point of weakness. Judah’s words turn into direct speech to : Judah is pictured calling out to God, needing to be brought back “to his people,” and needing help in real conflict.
The passage assumes tribal life can be fragile. A tribe can dwindle, become isolated, or face enemies. It also assumes that human effort (“with his hands he contended for himself”) and divine help (“be a help against his adversaries”) are not opposites; they appear together.
Where interpretation differs
Reuben: “live, and not die.” Some take this as strictly about survival as a tribe in history (not going extinct). Others hear a broader sense of “life” that includes well-being, not only bare survival.
Judah: “bring him in to his people.” Some understand “his people” as the wider nation (Judah being gathered and recognized among all Israel). Others think it points more narrowly to Judah’s own tribal community (returning to, or being reunited with, his own kin).
Judah: “with his hands he contended for himself.” Some read this as describing Judah’s military role—fighting battles. Others read it more generally as Judah having to struggle for his own cause, not necessarily specifying one kind of conflict.
Why the disagreement exists
The phrases are brief and poetic, and they do not supply the backstory (what situation Judah is being “brought back” from, or what specific conflict is in view). Because the wording can fit more than one plausible scenario, readers decide between options based on broader context about tribal relations and Israel’s expected conflicts.
What this passage clearly contributes
Explicitly, the text presents (1) Reuben’s need for survival and sufficient numbers, and (2) Judah’s need for God to hear, to restore Judah’s place among his people, and to provide help against enemies—while also portraying Judah as actively struggling with his own “hands.” Theologically inferred from these explicit claims, the passage supports a view of Israel’s future as involving both human striving and reliance on Yahweh’s aid, and it highlights that different tribes face different vulnerabilities within the one people (Deuteronomy 33:6; Deuteronomy 33:7).