Ephrem the Syrian : After Naaman had been persuaded by the prophet and had washed seven times in the Jordan, he eventually acknowledged his error. He was astonished, and a deep bewilderment took him when he realized that he had been delivered from his filthiness. And he thanked God for his healing and testified that the Lord of the universe, in his profound care for him, had conceded him that extraordinary power by simply using water. He also proclaimed that his healing could not have derived from the water of the river but had been caused by Elisha's command. That is why he offered royal presents, but the prophet did not accept them and was not persuaded by the donor, even though he had pressed him many times. For that magnificently and very clearly prefigured the mystery of the healing, which is freely granted to all nations of the earth by our Lord through the intercession of the apostles. And this had been promised in advance to those masters by the prophet Isaiah, when he said, "You were sold for nothing, and you shall be redeemed without money."Since all diseases are a sort of bondage, the prophet necessarily fixed the healing at the seventh bath, in parallel with the fact that the Law, too, orders and promises freedom for the slave at the seventh year. — ON THE SECOND BOOK OF KINGS 5:15