John 6:30

They said therefore unto him, What sign shewest thou then, that we may see, and believe thee? what dost thou work?

More from John 6

After these things Jesus went over the sea of Galilee, which is the sea of Tiberias.

And a great multitude followed him, because they saw his miracles which he did on them that were diseased.

And Jesus went up into a mountain, and there he sat with his disciples.

And the passover, a feast of the Jews, was nigh.

When Jesus then lifted up his eyes, and saw a great company come unto him, he saith unto Philip, Whence shall we buy bread, that these may eat?