Daniel 4:37

‘Now I Nebuchadnezzar praise and extol and honour the king of heaven, for all his works are truth and his ways judgment, and those who walk in pride he is able to abase.'

Nebuchadnezzar's final testimony is to the ‘king of heaven' whose works are truth and whose ways are wise, revealing excellent judgment. He may well have come, under Daniel's guidance, to a belief in Daniel's God. He certainly now saw the king of heaven as supreme and able to keep men humble and in their place.