Sirach 4:28LXX

26Accept no person against thy own person, nor against thy soul a lie.

27Reverence not thy neighbour in his fall:

28And refrain not to speak in the time of salvation. Hide not thy wisdom in her beauty.

29For by the tongue wisdom is discerned: and understanding, and knowledge, and learning by the word of the wise, and steadfastness in the works of justice.

30In nowise speak against the truth, but be ashamed of the lie of thy ignorance.