Leviticus 19:14 "You shall not curse (even) the deaf"

We are forbidden to curse any Jew.

Though this Negative Mitzvah mentions the deaf, it applies to all people.

We may think that expressing anger or frustration against a deaf person and uttering a curse is not so bad because the deaf person will not be able to hear us anyway!

However, the Torah cautions us never to curse anyone, neither a deaf person, nor even people who can hear.