Jerome
Catena Aurea · Matthäusevangelium 17
Mt 17, Verses 1–4English original
And after six days Jesus taketh Peter, James, and John his brother, and bringeth them up into an high mountain apart, And was transfigured before them: and his face did shine as the sun, and his raiment was white as the light. And, behold, there appeared unto them Moses and Elias talking with him. Then answered Peter, and said unto Jesus, Lord, it is good for us to be here: if thou wilt, let us make here three tabernacles; one for thee, and one for Moses, and one for Elias.
It is made a question how it could be after six days that He took them, when Luke says eight. (Luke 9:28.) The answer is easy, that here one reckoned only the intervening days, there the first and the last are also added.