I’m not a huge believer in certain types of karma in this world, but Jack Kornfield offers this discussion about karma related to speech, and intention:
“Speech is one area in which karma can be seen in an easy and direct way. For this exercise, resolve to take two or three days to carefully notice the intentions that motivate your speech. Direct your attention to the state of mind that precedes talking, the motivation for your comments, responses, and observations. Try to be particularly aware of whether your speech is even subtly motivated by boredom, concern, irritation, loneliness, compassion, fear, love, competitiveness, greed, or whatever state you observe ... Simply notice the various motivations in the mind and the speech that flows from them.”
“Then, after discovering which motivation is present as you speak, notice the effect of the speech. If there is competitiveness or grasping or pride or irritation behind the speech, what response does it elicit from the world around you? If there is compassion or love, what is the response? If your speech is mindless, as if you were on automatic pilot, what is the response? If there is clarity and concern, how is this received and responded to?”
It brings up an excellent point: What motivates your speech?