In the heat of anger
"He that is soon angry dealeth foolishly:
and a man of wicked devices is hated."
You don't have all the facts
"He that answereth a matter before he heareth it,
it is folly and shame unto him."
You haven't verified the story
"Seest thou a man that is hasty in his words?
there is more hope of a fool than of him."
Tempted to joke about sin
"Fools make a mock at sin:
but among the righteous there is favour."
Ashamed of your words later
"The words of a talebearer are as wounds,
and they go down into the innermost parts of the belly."
You want to appear wise
"Even a fool, when he holdeth his peace, is counted wise:
and he that shutteth his lips is esteemed a man of understanding."
It would destroy a friendship
"A froward man soweth strife:
and a whisperer separateth chief friends."
It would destroy a reputation
"An ungodly man diggeth up evil:
and in his lips there is as a burning fire."
When you may have to eat your words later
"Death and life are in the power of the tongue:
and they that love it shall eat the fruit thereof."
It's time to listen
"A wise son heareth his father's instruction:
but a scorner heareth not rebuke."
When you should be working instead
"In all labour there is profit:
but the talk of the lips tendeth only to penury."