Albert Barnes on Matthew 10:40-42

He that receiveth you, etc. In all these three illustrations Christ meant to teach substantially the same thing, that he that would entertain kindly, or treat with hospitality himself, his disciples, a prophet, or a righteous man, would show that he approved their character, and should not fail of proper reward. To receive in the name of a prophet, is to receive as a prophet; to do proper honour to his character; and to evince attachment to the cause in which he was engaged.

(b) "He that receiveth" Mt 18:5, 25:40,45, Jn 12:44