Sirach 6:20

20 She is very unpleasant to the unlearned: he that is without understanding will not remain with her.

Sirach 6:20 In-Context

18 My son, gather instruction from thy youth up: so shalt thou find wisdom till thine old age.
19 Come unto her as one that ploweth and soweth, and wait for her good fruits: for thou shalt not toil much in labouring about her, but thou shalt eat of her fruits right soon.
20 She is very unpleasant to the unlearned: he that is without understanding will not remain with her.
21 She will lie upon him as a mighty stone of trial; and he will cast her from him ere it be long.
22 For wisdom is according to her name, and she is not manifest unto many.

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