16
Strive not with an angry man, and go not with him into a solitary place: for blood is as nothing in his sight, and where there is no help, he will overthrow thee.
17
Consult not with a fool; for he cannot keep counsel.
18
Do no secret thing before a stranger; for thou knowest not what he will bring forth.
19
Open not thine heart to every man, lest he requite thee with a shrewd turn.
The Brenton translation of the Septuagint is in the public domain.