Remember covenant acts from Abraham to exodus: Moses, Aaron, and the signs

Moses and Aaron are sent, and signs strike the land of Ham

He sent Moses his servant; and Aaron whom he had chosen. They shewed his signs among them, and wonders in the land of Ham. He sent darkness, and made it dark; and they rebelled not against his word. He turned their waters into blood, and slew their fish. Their land brought forth frogs in abundance, in the chambers of their kings.

Servant and chosen pair the brothers as agents of signs. The plague sequence is worship's memory of rescue, selective and poetic, not a newspaper and not a complete match to Exodus's order. Land of Ham remains Egypt in the hymn.

Flies, hail, locusts, and the firstborn finish the signs as judgments of a mouth already praised

He spake, and there came divers sorts of flies, and lice in all their coasts. He gave them hail for rain, and flaming fire in their land. He smote their vines also and their fig trees; and brake the trees of their coasts. He spake, and the locusts came, and caterpillers, and that without number, and did eat up all the herbs in their land, and devoured the fruit of their ground. He smote also all the firstborn in their land, the chief of all their strength.

Speech brings insects, hail, fire, and the death of firstborn strength. The horror is not entertainment. It is remembered as the cost of a people's extraction from a house of slavery. The signs are not a pattern for later readers to wish on a modern nation, and they are not an anti-Egyptian ethnic slur to be recycled against anyone.