Shared ground
These verses present God providing Moses with a staged set of public signs meant to support Moses’ claim that God has sent him. The text assumes that initial skepticism is possible and even likely (“if they will neither believe…nor listen”). It also assumes belief may come gradually: one sign may fail to persuade, while a later sign may succeed.
A striking detail is the repeated language of “voice.” The signs are not mere wonders; they function like a communicated message that people can “listen” to or refuse. Alongside that, the passage pairs two responses—“believe” (believe) and “listen”—treating them as closely linked but not identical.
Where interpretation differs (only where needed)
1) What “the voice of the sign” means. Some read “voice” as a figure of speech: the sign’s meaning or implied message (“this really is God at work”). Others think it may include, or at least assume, accompanying explanation from Moses so that the sign’s “voice” is understood.
2) Who “they” are. Some understand “they” as the Israelites Moses is about to address (especially leaders). Others think the instruction is broad enough to cover any audience Moses must persuade in this mission, even if the immediate focus remains Israel.
3) How literal “will become blood” is within the story. Many take it as a straightforward miracle described as an actual transformation. Others allow that the narrative could be describing a blood-like appearance meant to communicate judgment and divine power, without specifying the chemistry of it.
Why the disagreement exists
The disagreements arise because the passage uses compact language. “Voice” is metaphorical speech, and the text does not spell out whether Moses speaks interpretive words during each sign. Likewise, “they” is not explicitly identified in vv. 8–9, and “become blood” is stated as a result without describing mechanism or duration.
What this passage clearly contributes
- God anticipates disbelief and does not treat it as an impossible scenario; the plan includes escalation (first sign, latter sign, then a further action).
- Signs are presented as communicative acts—each has a “voice” and is meant to be “heard” as evidence of God’s commissioning.
- Even after “two signs,” the text allows for continued refusal to believe or listen, so a third action is provided.
- The third action is explicit: Moses is to take water from “the river” (nile) and pour it onto dry ground; the stated outcome is that the poured-out river water “will become blood” on the dry land.