And Eliseus sent a messenger to him, saying: Go, and wash seven times in the Jordan, and thy flesh shall recover health, and thee shalt be clean.

and Elisha sendeth unto him a messenger, saying, 'Go, and thou hast washed seven times in Jordan, and thy flesh doth turn back to thee, and be thou clean.

And Elisha sent a servant to him, saying, Go to Jordan, and after washing seven times in its waters your flesh will be well again and you will be clean.

And Elisha sent a messenger unto him, saying: 'Go and wash in the Jordan seven times, and thy flesh shall come back to thee, and thou shalt be clean.'

And Elisha sent a messenger to him, saying, "Go, and wash seven times in the Jordan, and your flesh will receive health, and you will be clean."

Elisha was not deterred from personally meeting Naaman because he was a leper. He sent a messenger because Naaman had over-estimated his own importance 2-Kings 5:11), and needed rebuke.
And wash in Jordan - Compare the marginal references. A command is given which tests the faith of the recipient, and the miracle is not performed until such faith is openly evidenced.

Sent a messenger - Did not come out to speak with him: he had got his orders from God, and he transmitted them to Naaman by his servant.
Wash in Jordan seven times - The waters of Jordan had no tendency to remove this disorder but God chose to make them the means by which he would convey his healing power. He who is the author of life, health, and salvation, has a right to dispense, convey, and maintain them, by whatsoever means he pleases.

And Elisha sent a messenger unto him,.... Or returned an answer by Naaman's messenger; he did not go out to him, choosing to be retired, as he commonly did; and being perhaps employed in prayer for the cure; and it may be also to show his contempt of or little regard he had to worldly grandeur and honour, as well as to mortify the pride of Naaman:
saying, go and wash in Jordan seven times; so, according to the law of the cleansing the leper, he was to be sprinkled seven times, and on the seventh day his flesh was to be bathed or dipped all over in water, which is meant by washing here, Leviticus 14:7.
and thy flesh shall come again to thee; which was eaten and consumed by the disease on him:
and thou shalt be clean; freed from this pollution, or filthy disease, with which he was defiled; for a leper was reckoned unclean, Leviticus 13:3.

Elisha sent - Which he did, partly, to exercise Naaman's faith and obedience: partly, for the honour of his religion, that it might appear he sought not his own glory and profit, but only God's honour, and the good of men.