Charles Ellicott Commentary Proverbs 30:33

"For the churning of milk bringeth forth butter, And the wringing of the nose bringeth forth blood; So the forcing of wrath bringeth forth strife." — Proverbs 30:33 (ASV)

Surely the churning of milk bringeth forth butter... . —The same word is used in the Hebrew for the three which appear in the Authorised Version, “churning,” “wringing,” and “forcing.” The sense will be, “For (as) pressure on milk produces butter, and pressure on the nose produces blood, (so) pressure on wrath (violence towards a hot-tempered person) produces anger” .