# Burn a third of it

"Burn a third of your hair"

# midst

middle

# when the days of the siege are completed

"when the days of Jerusalem's siege have ended"

# take a third of the hair

"take one of the three piles of hair"

# strike it with the sword all around the city

"hit it with your sword all over the city"

# scatter a third of it to the wind

"let the wind blow the last third of your hair in different directions"

# I will draw out a sword to chase after the people

"I will cause their enemies to pursue them and attack them with swords" 

# I will draw out a sword

"I will pull a sword out of its container"