What Does Exodus 12:28 Mean?

Then the people of Israel went and did so; as the LORD had commanded Moses and Aaron, so they did. The compliance formula "as the LORD had commanded Moses and Aaron, so they did" is the narrative's confirmation that Israel performed the Passover exactly as instructed.

The formula appears repeatedly throughout the tabernacle construction (Exodus 39-40) as the standard of faithful execution: the people did exactly what YHWH commanded through Moses. Here, for the first time in Exodus, Israel achieves complete obedience to a divine command. The nation that will repeatedly fail throughout the wilderness journey performs its first communal act in perfect compliance.

The contrast between Israel's complete obedience and Pharaoh's complete disobedience is the sharpest contrast in the Exodus narrative as it reaches its climax: the enslaved people perfectly comply with the divine command; the God ruler perfectly refuses it. The ten-plague sequence is framed by perfect divine demand (YHWH says, let my people go) on one side and perfect human defiance (Pharaoh says no, ten times) on the other. At the Passover night, the distinction between the obedient and the disobedient, Israel and Egypt, becomes the distinction between the living and the dead.

The compliance report of verse 28 covers the entire night of the first Passover: the elders received Moses' instructions (verse 21), the households applied the blood, ate the meal in haste with the proper stance, and stayed inside their blood-marked homes until morning. The narrative does not detail each household's compliance; the single compliance formula covers every Israelite household simultaneously. The "so they did" is the nation-wide confirmation that the Passover procedures of verses 1-27 were performed exactly as commanded.