Whoever too precipitately yields
To anger, shall find sorrow at the last:
For wrath unbridled oft deceives mankind.

[Οργή γάρ όστις ευθέως χαρίζεται ,
Κακώς τελευτά πλείστα γάρ σφάλλει βρoτούς .]

Euripides (485?-406? BC) Greek tragic dramatist

Æolus [Αἴολος], frag. 31 (TGF) [tr. Wodhull (1809)]
    (Source)

Nauck frag. 31, Barnes frag. 62, Musgrave frag.3. (Source (Greek)). Alternate translation:

Whoever yields to anger suffers a piteous end.
[Source]