# He will drink of the brook along the road

"As he pursues his enemies, he will only stop to drink quickly from a brook" 

# he will lift his head

Possible meanings are 1) the king lifts up his own head or 2) Yahweh lifts up the head of the king.

# he will lift his head up high after victory

"he will confidently lift his head after victory" or "he will be victorious"