πρὸ δὲ τοῦ βαπτίσμος προνηστευσάτω ὁ βαπτίζων καὶ ὁ βαπτιζόμενος καὶ εἴ τινες ἄλλοι δύναται· κελεύεις δὲ νηστεῦσαι τὸν βαπτιζόμενον πρὸ μιᾶς ἢ δύο.

1. πρὸ
   before
2. δὲ
   but
   and
3. τοῦ
   of the
   the
4. βαπτίσμος
   baptism
5. προνηστευσάτω
   let fast beforehand
6. ὁ
   the
7. βαπτίζων
   baptizing
8. καὶ
   and
9. ὁ
   the
10. βαπτιζόμενος
    being baptized
    being immersed
11. καὶ
    and
12. εἴ
    if
13. τινες
    some
14. ἄλλοι
    others
15. δύναται
    is able
16.  
    ·
     
17. κελεύεις
    you command
    you order
18. δὲ
    but
    and
19. νηστεῦσαι
    to fast
20. τὸν
    the
21. βαπτιζόμενον
    one being baptized
22. πρὸ
    before
23. μιᾶς
    one
24. ἢ
    the
    or
25. δύο
    two
26.  
    .
     

Before the baptism, let the one baptizing and the one being baptized fast beforehand, and also any others if they are able. But you command the one being baptized to fast for one or two days beforehand.