Ἐὰν δὲ μὴ εἰσακούσητε ἡμῶν τοῦ περιτεμέσθαι, λαβόντες τὴν θυγατέρα ἡμῶν ἀπελευσόμεθα.

1. Ἐὰν
   If
2. δὲ
   but
   and
3. μὴ
   not
4. εἰσακούσητε
   you listen
5. ἡμῶν
   our
6. τοῦ
   of the
   the
7. περιτεμέσθαι
   to be circumcised
   be circumcised
8.  
   ,
    
9. λαβόντες
   having taken
10. τὴν
    the
11. θυγατέρα
    daughter
12. ἡμῶν
    our
13. ἀπελευσόμεθα
    we will go away
    shall we go, we will go
14.  
    .
     

But if you do not listen to us and be circumcised, we will take our daughter and go away.