Dark stratagems, and treachery, to relieve
The coward’s wants, were by mankind devis’d.

[δόλοι δὲ καὶ σκοτεινὰ μηχανήματα
χρείας ἀνάνδρου φάρμαχ᾽ εὕρηται βροτοῖς.]

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

Bellerophon [Βελλεροφῶν], frag. 288 (TGF) (c. 430 BC) [tr. Wodhull (1809)]
    (Source)

Nauck frag. 290, Barnes frag. 42, Musgrave frag. 8. (Source (Greek)). Alternate translations:

Tricks and dark schemes are mankind's invention as
cowardly remedies against need.
[tr. Collard, Hargreaves, Cropp (1995)]

Trickery and devious devices are man’s unmanly means to meet his needs.
[tr. Stevens (2012)]