Get not riches by unjust means, if thou wishest them to continue in thy family, for riches unjustly acquired quickly vanish.

[ἀδίκως δὲ μὴ κτῶ χρήματ᾽ ἣν βούλη πολὺν χρόνον μελάθροις ἐμμένειν” τὰ γὰρ κακῶς οἴκους ἐσελθόντ᾽ οὐκ ἔχει σωτηρίαν]

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

Erectheus [Ἐρεχθεύς], frag. 362, l. 11ff (TGF) (422 BC) [tr. Ramage (1864)]
    (Source)

Nauck frag. 362, Barnes frag. 1, Musgrave frag. 2. (Source (Greek)). Alternate translation:

No ill-gotten wealth possess.
If in thy mansions long thou hop'st-to dwells
For there is no reliance on that gold
Which through injustice enters our abodes.
[tr. Wodhull (1809)]