Why in Exodus 8:23 did God wait until the next day after Moses spoke with Pharoah to bring the swarm of flies?

Exodus 8:20 - 30

MSG - ²⁰ God said to Moses, "Get up early in the morning and confront Pharaoh as he goes down to the water. Tell him, 'God's Message: Release my people so they can worship me. If you don't release my people, I'll release swarms of flies on you, your servants, your people, and your homes. The houses of the Egyptians and even the ground under their feet will be thick with flies. But when it happens, I'll set Goshen where my people live aside as a sanctuary - no flies in Goshen. That will show you that I am God in this land. I'll make a sharp distinction between your people and mine. This sign will occur tomorrow.' ²⁴ And God did just that. Thick swarms of flies in Pharaoh's palace and the houses of his servants. All over Egypt, the country ruined by flies.

Clarify • Share • Report • Asked October 14 2014 • vicki reynoldson