Sirach 28:25

25 And weigh thy words in a balance, and make a door and bar for thy mouth.

Sirach 28:25 In-Context

23 Such as forsake the Lord shall fall into it; and it shall burn in them, and not be quenched; it shall be sent upon them as a lion, and devour them as a leopard.
24 Look that thou hedge thy possession about with thorns, and bind up thy silver and gold,
25 And weigh thy words in a balance, and make a door and bar for thy mouth.
26 Beware thou slide not by it, lest thou fall before him that lieth in wait.

The Brenton translation of the Septuagint is in the public domain.