Ὅριον ἔθου ὃ οὐ παρελεύσονται, οὐδὲ ἐπιστρέψουσι καλύψαι τὴν γῆν.

1. Ὅριον
   Boundary
   Border
2. ἔθου
   you placed
   you set
3. ὃ
   the
4. οὐ
   not
5. παρελεύσονται
   will pass away
   they will pass
6.  
   ,
    
7. οὐδὲ
   nor
8. ἐπιστρέψουσι
   they will return
   they will restore, will they return
9. καλύψαι
   to cover
10. τὴν
    the
11. γῆν
    land
    earth
12.  
    .
     

You placed a boundary which they will not pass, nor will they return to cover the land.