καὶ ὃς ἐὰν θέλῃ ἐν ὑμῖν εἶναι πρῶτος, ἔσται ὑμῶν δοῦλος·

1. καὶ
   and
2. ὃς
   who
3. ἐὰν
   if
4. θέλῃ
   wants
   desires
5. ἐν
   in
6. ὑμῖν
   to you
7. εἶναι
   to be
8. πρῶτος
   first
9.  
   ,
    
10. ἔσται
    will be
11. ὑμῶν
    your
12. δοῦλος
    slave
13.  
    ·
     

and whoever wants to be first among you will be your slave,