And when he saw them, he said unto them, Go shew yourselves unto the priests. And it came to pass, that, as they went, they were cleansed.
And when he saw them, he said unto them, Go show yourselves unto the priests - that is, as cleansed persons. See the note at Matthew 8:4. One of these was a Samaritan; but he too was required to go with the rest, thus teaching him that "Salvation was of the Jews" (John 4:22). And yet, when ordered to do this, they had not been cleansed. A great trial of faith this was. But they obeyed.
And it came to pass, that, as they went, they were cleansed. In how many different ways were our Lord's cures performed, and this different from all the rest! Yet it closely resembled the cure of the nobleman's son (John 4:50-53).