John Chrysostom
Catena Aurea · Matthäusevangelium 17
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.
He does not take them up immediately upon the promise being made, but six days after, for this reason, that the other disciples might not be touched with any human passion, as a feeling of jealousy; or else that during these days’ space, those disciples who were to be taken up might become kindled with a more eager desire.