Shared ground
These lines portray tribal well-being as something Yahweh grants and shapes, not as random luck. Zebulun and Issachar are paired: one is pictured as thriving in outward movement (“going out”), the other in settled life (“tents”). Their prosperity is linked to worship and public gathering: they “call the peoples to the mountain” and offer “sacrifices of righteousness,” while drawing wealth from the sea and from “hidden treasures of the sand.”
Gad’s blessing highlights expansion and strength. Gad’s growth is credited to the one who “enlarges” them. Gad is pictured as fierce in defense and victory (lioness imagery). At the same time, Gad is described as aligned with Israel’s public leadership, taking a leading share and participating with “the heads of the people” in carrying out Yahweh’s “righteousness” and “ordinances” together with Israel.
Where interpretation differs
Who are “the peoples”? Some read “the peoples” as other Israelite tribes being summoned to a shared worship site. Others read it more broadly as surrounding nations being drawn in, whether through trade relationships or through recognition of Yahweh.
What is “the mountain”? Some take it as a specific mountain known for assembly and worship. Others treat it as a general poetic way to describe a recognized worship gathering place.
What are “sacrifices of righteousness”? Some take this mainly as sacrifices offered correctly according to the required standards. Others hear a stronger moral note: the offerings reflect right relationship and integrity, not just correct procedure.
What are “hidden treasures of the sand”? Options include shoreline resources (like coastal trade goods), materials gathered or extracted (like minerals or dyes), or more generally “wealth that comes from the land along the shore.”
Why the disagreement exists
The passage is compressed poetry. It uses broad images (“mountain,” “peoples,” “treasures”) without naming exact locations or mechanisms. Because the lines also connect worship language with economic language (sea, sand, abundance), interpreters weigh differently whether the emphasis is mainly on trade/wealth, on worship/assembly, or on both together.
What this passage clearly contributes
Explicitly, the text ties the blessing of Zebulun and Issachar to fitting spheres of life (movement and home), to a public gathering at a “mountain,” to “sacrifices of righteousness,” and to wealth associated with sea and shore. It also explicitly presents Gad as enlarged by divine favor, strong like a predator in battle, and participating with Israel’s leaders in carrying out Yahweh’s standards with the nation. Theologically, the passage contributes a picture of Israel’s tribes as economically varied yet bound together by shared worship and shared accountability to Yahweh’s “righteousness” and “ordinances” (an inference drawn from the way worship and national leadership are placed side by side).