ΔΕΞΑ (Dexa) - "Take that" or "Catch" an inscription found on a 4th century BC sling bullet from Athens in the British Museum, Upper floor, Room 69, Greece and Rome: Daily Life
Spoiler Alert, click show to read: 

Think "Take that" is the more accurate translation but "Catch" is more funnier
Also read as ΔΕΞΑΙ (Dexai) in Foss, Clive. "A Bullet of Tissaphernes." The Journal of Hellenic Studies, 95, 25-30. 1975.