Isaiah 45:2-3

2I will go before you and will level the mountains Dead Sea Scrolls and Septuagint; the meaning of the word in the Masoretic Text is uncertain. ; I will break down gates of bronze and cut through bars of iron.

3I will give you hidden treasures, riches stored in secret places, so that you may know that I am the LORD, the God of Israel, who summons you by name.