In a gathering, people begin criticizing someone absent without evidence. One can avoid joining the conversation and, where appropriate, redirect it gently. By contrast, if an innocent person is falsely accused and one has reliable testimony, remaining silent may allow injustice to continue.
Example 1: Refrain from sending an angry message immediately; revise it into a truthful, measured statement.
Example 2: Report credible information about harm through an appropriate responsible channel.
The brevity of the narration teaches control of the tongue, not an escape from truthfulness, necessary testimony, or constructive counsel.