'Stomped' in the Bible

Why are your clothes red? Why do you look like someone who has stomped on grapes in a vat?

"I have stomped grapes in the winepress all by myself; no one from the nations joined me. I stomped on them in my anger; I trampled them down in my rage. Their juice splashed on my garments, and stained all my clothes.

(Samek) He rounded up all my mighty ones; The Lord did this in my midst. He summoned an assembly against me to shatter my young men. The Lord has stomped like grapes the virgin daughter, Judah.