# split open the hollow place

"opened a hole in the ground" or "opened the low place." 

# his strength returned and he revived

"he became strong again" or "he was revived"

# En Hakkore

"spring of him who prayed.". This is the name of a place. 

# it is at Lehi to this day

"the spring can still be found at Lehi, even today"