Augustine of Hippo
Catena Aurea · Matthäusevangelium 14
And straightway Jesus constrained his disciples to get into a ship, and to go before him unto the other side, while he sent the multitudes away. And when he had sent the multitudes away, he went up into a mountain apart to pray: and when the evening was come, he was there alone. But the ship was now in the midst of the sea, tossed with waves: for the wind was contrary. And in the fourth watch of the night Jesus went unto them, walking on the sea. And when the disciples saw him walking on the sea, they were troubled, saying, It is a spirit; and they cried out for fear. But straightway Jesus spake unto them, saying, Be of good cheer; it is I; be not afraid. And Peter answered him and said, Lord, if it be thou, bid me come unto thee on the water. And he said, Come. And when Peter was come down out of the ship, he walked on the water, to go to Jesus. But when he saw the wind boisterous, he was afraid; and beginning to sink, he cried, saying, Lord, save me. And immediately Jesus stretched forth his hand, and caught him, and said unto him, O thou of little faith, wherefore didst thou doubt? And when they were come into the ship, the wind ceased. Then they that were in the ship came and worshipped him, saying, Of a truth thou art the Son of God.
(De Cons. Ev. ii. 47.) This may seem contrary to that Matthew says, that having sent the multitudes away, He went up into a mountain that He might pray alone; and John again says, that it was on a mountain that He fed this same multitude. But since John himself says further, that after that miracle He retired to a mountain that He might not be held by the multitude, who sought to make Him a king, it is clear that He had come down from the mountain when He fed them. Nor do Matthew’s words, He went up into a mountain alone to pray, disagree with this, though John says, When he knew that they would come to make him a king, he withdrew into a mountain himself alone. (John 6:15.) For the cause of His praying is not contrary to the cause of His retiring, for herein the Lord teaches us that we have great cause for prayer when we have cause for flight. Nor, again, is it contrary to this that Matthew says first, that He bade His disciples go into the boat, and then that He sent the multitudes away, and went into a mountain alone to pray; while John relates that He first withdrew to the mountain, and then, when it was late, his disciples went down to the sea, and when they had entered into a boat, &c. for who does not see that John is relating as afterwards done by His disciples what Jesus had commanded before He retired into the mountain?