John Calvin on John 6:13

13. And filled twelve baskets. When four thousand men were fed by seven loaves, Matthew relates that the number of baskets filled with fragments was exactly the same with the number of the loaves, (Matthew 15:37.) Since, therefore, a smaller quantity is sufficient for a greater number of men, and since the quantity left is nearly double, hence we see more clearly of what value is that blessing of God, against the sight of which we deliberately shut our eyes. We ought also to observe, in passing, that though Christ commands them to fill the baskets for illustrating the miracle, yet he likewise exhorts his disciples to frugality, when he says, Gather the fragments which are left, that nothing may be lost; for the increase of the bounty of God ought not to be an excitement to luxury. Let those, therefore, who have abundance, remember that they will one day render an account of their immoderate wealth, if they do not carefully and faithfully apply their superfluity to purposes which are good, and of which God approves.

John 6:14-21

14. Those men, therefore, when they saw the miracle which Jesus had performed, said, This is truly the Prophet who is to come into the world. 15. And when Jesus knew that they would come and take him by force, to make him a king, he again withdrew alone into a mountain. 16. And when it was evening, his disciples went down to the sea. 17. And having entered into a ship, they came across the sea into Capernaum; and it was now dark, and Jesus had not come to them. 18. And the sea arose by means of a great wind that blew. 19. When therefore they had rowed about five-and-twenty or thirty furlongs, they see Jesus walking on the sea; and when he approached the ship, “Ils voyent Jesus cheminant sur la mer, s’approchant de la nasselle, dont ils eurent peur.” — “They see Jesus walking on the sea, and approaching the ship, at which they were afraid.” they were terrified. 20. But he saith to them, It is I, be not terrified. 21. They were willing, therefore, to receive him into the ship; and immediately the ship reached the place to which they were going.