ἐφεστώς

From LSJ

ὃ σὺ μισεῖς ἑτέρῳ μὴ ποιήσεις → don't do to others what you don't want them to do to you

Source

French (Bailly abrégé)

ἐφεστῶσα, ἐφεστός;
part. pf. att. de ἐφίστημι.

Russian (Dvoretsky)

ἐφεστώς: ἐφεστῶσα, ἐφεστός атт. part. pf. к ἐφίστημι.