Jerome
Catena Aurea · Matthäusevangelium 10
He that receiveth you receiveth me, and he that receiveth me receiveth him that sent me. He that receiveth a prophet in the name of a prophet shall receive a prophet’s reward; and he that receiveth a righteous man in the name of a righteous man shall receive a righteous man’s reward. And whosoever shall give to drink unto one of these little ones a cup of cold water only in the name of a disciple, verily I say unto you, he shall in no wise lose his reward.
Otherwise; To this His exhortation to the disciple to entertain his teacher, there might a secret objection arise among the faithful; then shall we have to support the false prophets, or Judas the traitor. To this end it is that the Lord instructs them in these words, that it is not the person but the office that they should look to; and that the entertainer loses not his reward, though he whom he entertains be unworthy.