“He is a gossip: as one who tells that which is unseasonable, that which is not fact, that which is not good, that which is not the Dhamma, that which is not the Discipline, and he speaks out of season speech not worth recording, which is unreasoned, indefinite, and unconnected with good.” Saleyyaka Sutta: The Brahmans of Sala (MN 41)
“(He) should utter skillful words
that are not untimely;
should give no mind
to the gossip people might say.”
Sariputta Sutta (Snp 4.16)
“Here some person abstains from killing living beings, from taking what is not given, from misconduct in sexual desires, from false speech, from malicious speech, from harsh speech, from gossip, he is not covetous, is not ill-willed, and has right view. On the dissolution of the body, after death, he reappears in a happy destination, in the heavenly world.” Maha-kammavibhanga Sutta: The Great Exposition of Kamma (MN 136)
And then there’s the Dhamma expressed by Kim Wilson, formerly of The Fabulous Thunderbirds.