εἰ ἀνταπέδωκα τοῖς ἀνταποδιδοῦσί μοι κακὰ, ἀποπέσοιμι ἄρα ἀπὸ τῶν ἐχθρῶν μου κενός·

1. εἰ
   if
2. ἀνταπέδωκα
   i have repaid
   i repaid, repaid
3. τοῖς
   the
   to the
4. ἀνταποδιδοῦσί
   repaying
5. μοι
   to me
6. κακὰ
   evils
7.  
   ,
    
8. ἀποπέσοιμι
   may i fall
9. ἄρα
   then
   therefore
10. ἀπὸ
    from
11. τῶν
    of the
12. ἐχθρῶν
    enemies
13. μου
    my
14. κενός
    empty
15.  
    ·
     

If I have repaid evils to those repaying me with evils, then may I fall empty before my enemies.