The phrase "I will restore what the locust has eaten" comes from Joel 2:25 in the Bible. It means God promises to restore and compensate for the years and harvests that were destroyed by locust invasions. The locusts had destroyed crops, seeds, and fruit trees, causing multi-year devastation. God's restoration includes providing abundant harvests, green pastures, fruitful trees, and overall blessing that more than makes up for what was lost. Spiritually, it also represents the restoration of people to a place of blessing and favor after judgment, when they repent. This promise highlights both physical and spiritual renewal after loss and hardship caused by the locusts.