Εἰ δὲ μὴ ἀνέβη ἡ νεφέλη, οὐκ ἀνεζεύγνυσαν ἕως ἡμέρας, ἧς ἀνέβη ἡ νεφέλη.

1. Εἰ
   If
2. δὲ
   but
   and
3. μὴ
   not
4. ἀνέβη
   went up
5. ἡ
   the
   or
6. νεφέλη
   cloud
7.  
   ,
    
8. οὐκ
   not
9. ἀνεζεύγνυσαν
   they set out
   broke camp
10. ἕως
    until
11. ἡμέρας
    days
    day
12.  
    ,
     
13. ἧς
    which
14. ἀνέβη
    went up
15. ἡ
    the
    or
16. νεφέλη
    cloud
17.  
    .
     

If the cloud did not go up, they did not set out until the day the cloud went up.