I beat them into fine pieces like dust before the wind

The psalmists enemies are compared to dust to show how defeated they are. (See: rc://en/ta/man/jit/figs-simile)

I threw them out like mud in the streets

The psalmist's enemies are compared to mud in the streets to show how defeated they are. (See: rc://en/ta/man/jit/figs-simile)