ὅτι ὃν σὺ ἐπάταξας, αὐτοὶ κατεδίωξαν, καὶ ἐπὶ τὸ ἄλγος τῶν τραυμάτων μου προσέθηκαν.

1. ὅτι
   that
   because
2. ὃν
   which
   whom, being
3. σὺ
   you
4. ἐπάταξας
   you struck
5.  
   ,
    
6. αὐτοὶ
   they
   themselves
7. κατεδίωξαν
   they pursued
   pursued
8.  
   ,
    
9. καὶ
   and
10. ἐπὶ
    upon
11. τὸ
    the
12. ἄλγος
    pain
13. τῶν
    of the
14. τραυμάτων
    wounds
15. μου
    my
16. προσέθηκαν
    they added
    added
17.  
    .
     

Because they pursued the one whom you struck, and they added to the pain of my wounds.