Isaiah 4

Isaiah starts the description of God's judgment and his restoration with similar wording: "In that day the LORD...."(3:18) verses "In that day the branch of the LORD..."(4:2).  The contrast of judgment and deliverance are repeated often throughout God's word because we are always deserving of judgment and he is always working toward our deliverance. And God's deliverance is usually presented through the branch, aka Jesus. That is why our hope is in the power of God's righteous branch.
It took a little more than 1 minute to read this chapter.
Stuart