# The eternal God is a refuge

"The eternal God will protect his people" 

# underneath are the everlasting arms

"he will support and take care of his people forever"

# He thrust out ... he said

"He will thrust out ... he will say"

# before you ... Destroy

Moses speaks to the Israelites as if they were one man, so the word "you" and the command "destroy" here are singular. 

# he said, "Destroy!"

"he will tell you to destroy them!"