Ambrose of Milan
Catena Aurea · Lukasevangelium 7
And the disciples of John shewed him of all these things. And John calling unto him two of his disciples sent them to Jesus, saying, Art thou he that should come? or look we for another? When the men were come unto him, they said, John Baptist hath sent us unto thee, saying, Art thou he that should come? or look we for another? And in the same hour he cured many of their infirmities and plagues, and of evil spirits; and unto many that were blind he gave sight. Then Jesus answering said unto them, Go your way, and tell John what things ye have seen and heard; how that the blind see, the lame walk, the lepers are cleansed, the deaf hear, the dead are raised, to the poor the Gospel is preached. And blessed is he, whosoever shall not be offended in me.
But how could it come to pass, that Him of whom he said, Behold him who taketh away the sins of the world, he should still not believe to be the Son of God? For either it is presumption to attribute to Christ a divine action ignorantly, or it is unbelief to have doubted concerning the Son of God. But some suppose of John himself that he was indeed so great a prophet as to acknowledge Christ, but still as not a doubting, but pious, prophet disbelieved that He would die, whom he believed was about to come. Not therefore in his faith but in his piety, he doubted; as Peter also, when he said, Be it far from thee, Lord; this shall not be unto thee. (Mat 16:22.)