What does Exodus 5:21 mean?
The nation of Israel is still trapped in Egypt (Exodus 1:11, 13–14). Their lives are hard and harsh, making bricks for the Egyptians. When Moses and Aaron arrive to demand freedom (Exodus 5:1–3), Egypt's king retaliates (Exodus 5:6–9). Jewish foremen complain about the abuse (Exodus 5:14–16), and it is readily apparent that the Pharaoh's demands are intended as revenge (Exodus 5:17–19). Pharaoh is angry that the people would ask for freedom; this is a graphic warning about what happens when slaves get such ideas.The foreman's complaint that Moses and Aaron "have made us stink" uses the Hebrew word hibastem', referring to something disgusting or repulsive. If the ruler of all Egypt is that annoyed with slaves, the people are in constant threat of abuse. In bitterness, the Hebrew supervisors wish that God would judge Moses and Aaron. These would-be liberators have made Hebrew lives even worse. This infighting is part of Pharaoh's plan. So long as slaves are attacking fellow captives, they'll have no time left over for complaints or rebellion.
The situation appears impossible. Moses will express doubts about why things have gotten worse, not better (Exodus 5:22–23). Yet the Lord will use this situation to show His great power in the midst of a hopeless context (Exodus 6:1).