Eccl 5:1-7 – Keep thy foot when thou goest to the house of God, and be more ready to hear, than to give the sacrifice of fools: for they consider not that they do evil. Be not rash with thy mouth, and let not thine heart be hasty to utter any thing before God: for God is in heaven, and thou upon earth: therefore let thy words be few. For a dream cometh through the multitude of business; and a fool’s voice is known by multitude of words. When thou vowest a vow unto God, defer not to pay it; for he hath no pleasure in fools: pay that which thou hast vowed. Better is it that thou shouldest not vow, than that thou shouldest vow and not pay. Suffer not thy mouth to cause thy flesh to sin; neither say thou before the angel, that it was an error: wherefore would God be angry at thy voice, and destroy the work of thine hands? For in the multitude of dreams and many words there are also divers vanities: but fear thou God.
For the SIH devotional on this subject: