Isaiah 8:12
"Say ye not, A confederacy, to all them to whom this people shall say, A confederacy; neither fear ye their fear, nor be afraid."
Cross References (ranked by relevance)
Luke 21:9
But when ye shall hear of wars and commotions, be not terrified: for these things must first come to pass; but the end is not by and by.
Psalm 53:5
There were they in great fear, where no fear was: for God hath scattered the bones of him that encampeth against thee: thou hast put them to shame, because God hath despised them.
Isaiah 30:1
Woe to the rebellious children, saith the LORD, that take counsel, but not of me; and that cover with a covering, but not of my spirit, that they may add sin to sin: