Exodus 8:14
And they gathered them together upon heaps: and the land stank.
Cross-reference
Exodus 8:24
Parallel
In Exodus 8:24, the plague of flies ruins the land; here the frog carcasses make the land stink. Both plagues leave environmental devastation.
Exodus 7:21
Parallel
In Exodus 7:21, the Nile stinks from dead fish; here the land stinks from dead frogs. Both plagues produce foul odors from dead creatures.