Ben Sira 37:21

21 A wicked word shall change the beast: out of which four manner of things arise, good and evil, life and death: and the tongue is continually the ruler of them. There is a man that is subtle and a teacher of many, and yet is unprofitable to his own soul.

Ben Sira 37:21 In-Context

19 But above all these things pray to the most High, that he may direct thy way in truth.

20 In all thy works let the true word go before thee, and steady counsel before every action.

21 A wicked word shall change the beast: out of which four manner of things arise, good and evil, life and death: and the tongue is continually the ruler of them. There is a man that is subtle and a teacher of many, and yet is unprofitable to his own soul.

22 A skilful man hath taught many, and is sweet to his own soul.

23 He that speaketh sophistically, is hateful: he shall be destitute of every thing.