Matthew 8:1

Verse 1. And when he was come down from the mountain. Saint Matthew says, that Jesus Christ ascended the mountain, and sat down to teach the people; while Saint Luke affirms, that he descended, and stood in a plain place. But there is no contradiction; for he first ascended to the top of the mountain, and then descended to an even plain, which formed part of the descent. Here he stood for a while, and cured the sick, as mentioned by Saint Luke; but afterwards, according to the relation of Saint Matthew, he sat down, which was the usual posture of the Jewish doctors. Saint Augustine