Ecclesiastes 5:6

Suffer not, etc.] i.e. suffer not your hasty vow to lead you into wrongdoing. The angel] either the angel who, according to Rabbinic belief, presided over the sacrifice (this is, however, somewhat out of harmony with the tone of the book), or the priest, to whom the person who makes the vow addressed himself. RM has 'messenger of God' (see Malachi 2:7).

An error] H e has brought an offering of inferior value, or gives a frivolous excuse for the non-fulfilment of the vow. And destroy] Punishment will ensue. H e here recognises that the world is no mere machine: there is a righteous Judge.