The day after Jesus feeds the multitudes bread and fish he teaches them more about who He is and what He comes to do.
He is the bread of life.

22On the next day the crowd that remained on the other side of the sea saw that there had been only one boat there, and that Jesus had not entered the boat with his disciples, but that his disciples had gone away alone. 23Other boats from Tiberias came near the place where they had eaten the bread after the Lord had given thanks. 24So when the crowd saw that Jesus was not there, nor his disciples, they themselves got into the boats and went to Capernaum, seeking Jesus.
25When they found him on the other side of the sea, they said to him, “Rabbi, when did you come here?” 26Jesus answered them, “Truly, truly, I say to you, you are seeking me, not because you saw signs, but because you ate your fill of the loaves. 27Do not labor for the food that perishes, but for the food that endures to eternal life, which the Son of Man will give to you. For on him God the Father has set his seal.” 28Then they said to him, “What must we do, to be doing the works of God?” 29Jesus answered them, “This is the work of God, that you believe in him whom he has sent.” 30So they said to him, “Then what sign do you do, that we may see and believe you? What work do you perform? 31Our fathers ate the manna in the wilderness; as it is written, ‘He gave them bread from heaven to eat.’” 32Jesus then said to them, “Truly, truly, I say to you, it was not Moses who gave you the bread from heaven, but my Father gives you the true bread from heaven. 33For the bread of God is he who comes down from heaven and gives life to the world.” 34They said to him, “Sir, give us this bread always.”
35Jesus said to them, “I am the bread of life; whoever comes to me shall not hunger, and whoever believes in me shall never thirst.