Augustine of Hippo
Catena Aurea · Markusevangelium 6
And king Herod heard of him; (for his name was spread abroad:) and he said, That John the Baptist was risen from the dead, and therefore mighty works do shew forth themselves in him. Others said, That it is Elias. And others said, That it is a prophet, or as one of the prophets. But when Herod heard thereof, he said, It is John, whom I beheaded: he is risen from the dead.
(de Con. Evan. ii. 43) But in these words Luke bears witness to Mark, to this point at least, that others and not Herod said that John had risen; but Luke had represented Herod as hesitating, and has put down his words as if he said, John have I beheaded, but who is this of whom I hear such things? We must however suppose, that after this hesitation, he had confirmed in his own mind what others had said, for he says to his children, as Matthew relates, This is John the Baptist, he has risen from the dead. (Matt. 14:2) Or else these words are to be spoken, so as to indicate that he is still hesitating, particularly as Mark who had said above that others had declared that John had risen from the dead, afterwards however is not silent as to Herod’s plainly saying, It is John, whom I beheaded: he is risen from the dead. Which words also may be spoken in two ways, either they may be understood as those of a man affirming or doubling.