Bede the Venerable — as excerpted in the Catena Aurea on John 6:15-21

“The multitude concluding, from so great a miracle, that He was merciful and powerful, wished to make Him a king. For men like having a merciful king to rule over them, and a powerful one to protect them. Our Lord knowing this, retired to the mountain: When Jesus therefore perceived that they would come and take Him by force to make Him a king, He departed again into a mountain Himself alone. From this we gather, that our Lord went down from the mountain before, where He was sitting with His disciples, when He saw the multitude coming, and had fed them on the plain below. For how could He go up to the mountain again, unless He had come down from it.”