Religious policy of Cyrus is well documented in Babylonian texts as well as Jewish sources. Cyrus initiated a general policy that can be described as a policy of permitting religious freedom throughout his vast empire. He brought peace to the Babylonians and is said to have kept his army away from the temples and restored the statues of the Babylonian gods to their sanctuaries.[14] Another example of his religious policies, as evidenced by the Cyrus cylinder (see below), was his treatment of the Jews during their exile in Babylon after Nebuchadnezzar II destroyed Jerusalem. The Jewish Bible's Ketuvim ends in Second Chronicles with the decree of Cyrus, which returned the exiles to the Promised Land from Babylon along with a commission to rebuild the temple.
'Thus saith Cyrus king of Persia: All the kingdoms of the earth hath the LORD, the God of heaven, given me; and He hath charged me to build Him a house in Jerusalem, which is in Judah. Whosoever there is among you of all His people--the LORD his God be with him--let him go up.' (ezra 1:1-4)
This edict is also fully reproduced in the Book of Ezra.
In the first year of King Cyrus, Cyrus the king issued a decree: Concerning the house of God at Jerusalem, let the temple, the place where sacrifices are offered, be rebuilt and let its foundations be retained, its height being 60 cubits and its width 60 cubits; with three layers of huge stones and one layer of timbers. And let the cost be paid from the royal treasury. Also let the gold and silver utensils of the house of God, which Nebuchadnezzar took from the temple in Jerusalem and brought to Babylon, be returned and brought to their places in the temple in Jerusalem; and you shall put them in the house of God. (Ezra 6:3-5)
As a result of Cyrus' policies, the Jews honored him as a dignified and righteous king. He is the only Gentile to be designated as a messiah, a divinely-appointed king, in the Tanakh (Isaiah 45:1-6).