In his book Saturnalia (3.4.8), Macrobius writes:

Now, Cassius Hemina says (fr. 7) that the Samothracian gods and the corresponding gods of the Romans - the Penates - are properly called (in Greek) "great (megaloi) gods," "good (khrêstoi ) gods" and "mighty (dynatoi) gods. (Kaster, 33)

Although he is writing in Latin, Macrobius includes the Greek text, θεοὺς χρηστούς or theous chrestous, the accusative of theoi chrestoi, meaning "good gods," and χρηστήν or chresten, the accusative feminine of chrestos.