Ezra 6:22 ESV

And they kept the Feast of Unleavened Bread seven days with joy, for the LORD had made them joyful and had turned the heart of the king of Assyria to them, so that he aided them in the work of the house of God, the God of Israel.

He can make you joyful, and can turn any heart to come to your help, even the heart of the king of Assyria.