What does Exodus 5:3 mean?
Moses and Aaron answered Pharaoh's rejection (Exodus 5:1–2) with a second plea. This again appeals to a command from God. Since Pharaoh worships Egyptian deities, the second request describes the Lord as "God of the Hebrews." Using this phrase—which only seems to appear when directed to Pharaoh (Exodus 7:16; 9:1, 13; 10:3)—emphasized a distinction between the Lord and pagan idols.For now, no threats are made against Egypt. In fact, the message suggests that the Hebrews are the ones at risk. Yet Pharaoh will refuse and spitefully make the Israelite slaves (Exodus 1:13–14) work even harder (Exodus 5:6–9). This stubbornness establishes a pattern for the next few chapters. Soon, God will demonstrate His power in a series of escalating plagues. None of these will convince Egypt's king to free the people until his own son is killed (Exodus 4:22–23; 12:30–31).
Although the goal is Israel's liberation (Exodus 3:10), so far Moses and Aaron have only asked for temporary leave (Exodus 5:1). This is not a trick (Exodus 3:18); it's more likely that Pharaoh's refusal of a lesser request is proof that he would never have considered giving the Hebrews complete freedom (Exodus 3:19–20).