Ecclesiastes 10:12-14 Words of a wise man’s mouth show favour, but the lips of a fool swallow him up; (13) the beginning of the words of his mouth is foolishness, and the end of his talk is wicked madness. (14) And a fool increases words; a man knows not what shall come to be; and who declares to him what shall be after him?
Ecclesiastes 10:20 Do not curse the sovereign, even in your thought; do not curse the rich, even in your bedroom; for a bird of the heavens conveys the voice, and a bird in flight makes the matter known.
Proverbs 22:3 A clever one foresees evil and hides himself, but the simple go on and are punished.
Awmus (Amos) 5:13 Therefore the wise keep silent at that time, for it is an evil time.
Note: Modern technology has breathed new life into this old proverb. Therefore, be careful what you tweet.