22 On the next day, the multitude that stood on the other side of the sea saw that there was no other boat there, except the one in which his disciples had embarked, and that Jesus hadn’t entered with his disciples into the boat, but his disciples had gone away alone. 23 However boats from Tiberias came near to the place where they ate the bread after the Lord had given thanks. 24 When the multitude therefore saw that Jesus wasn’t there, nor his disciples, they themselves got into the boats, and came to Capernaum, seeking Jesus. 25 When they found him on the other side of the sea, they asked him, “Rabbi, when did you come here?”

26 Jesus answered them, “Most certainly I tell you, you seek me, not because you saw signs, but because you ate of the loaves, and were filled. 27 Don’t work for the food which perishes, but for the food which remains to eternal life, which the Son of Man will give to you. For God the Father has sealed him.”

28 They said therefore to him, “What must we do, that we may work the works of God?”

29 Jesus answered them, “This is the work of God, that you believe in him whom he has sent.”

John 6:22-29 - World English Bible

This passage introduced the Eucharistic discourse in John 6. 6:22-24 described the travel of the crowds vs. the arrival of the Jesus and his disciples in Capernaum; the journey set up the question the people asked in 6:25, "Rabbi, where did you come from?" The evangelist used the question of origin to distinguish between geographic travel (came from Tiberius) and divine mission (came from the Father). The Lord answered the reason the people followed him to Capernaum (signs and earthly food in 6:26) to address the subject of his mission (give bread that led to eternal life, for the Father sent him in 6:27). The people implicitly accepted this shift from geography to mission with their next question; they believed he came from God and revealed divine power, so what should they do to fulfill God's will? His answer was simple: become a disciple.

How can you show others that you are a disciple of Jesus?