Ben Sira 23:15

15 A man accustomed to use insulting words will never become disciplined all his days.

Ben Sira 23:15 In-Context

13 Do not accustom your mouth to lewd vulgarity, for it involves sinful speech.

14 Remember your father and mother when you sit among great men; lest you be forgetful in their presence, and be deemed a fool on account of your habits; then you will wish that you had never been born, and you will curse the day of your birth

15 A man accustomed to use insulting words will never become disciplined all his days.

16 Two sorts of men multiply sins, and a third incurs wrath. The soul heated like a burning fire will not be quenched until it is consumed; a man who commits fornication with his near of kin will never cease until the fire burns him up.

17 To a fornicator all bread tastes sweet; he will never cease until he dies.