John 6:26-30

26Jesus replied, “I tell you the solemn truth, you are looking for me not because you saw miraculous signs, but because you ate all the loaves of bread you wanted.

27Do not work for the food that disappears, but for the food that remains to eternal life – the food which the Son of Man will give to you. For God the Father has put his seal of approval on him.”

28So then they said to him, “What must we do to accomplish the deeds God requires?”

29Jesus replied, “This is the deed God requires – to believe in the one whom he sent.”

30So they said to him, “Then what miraculous sign will you perform, so that we may see it and believe you? What will you do?