John 6:30

“When Pharaoh speaks to you, saying, ‘Work a miraculous wonder,’ then you shall say to Aaron, ‘Take your staff and throw it down before Pharaoh, that it may become a serpent.’”

Then some of the scribes and Pharisees answered and said to Him, “Teacher, we want to see a sign from You.”

Jesus did this in Cana of Galilee as the beginning of His signs, and manifested His glory, and His disciples believed in Him.

Now a large crowd was following Him, because they were seeing the signs which He was doing on those who were sick.

On the next day, the crowd which stood on the other side of the sea saw that there was no other small boat there, except one, and that Jesus had not entered with His disciples into the boat, but that His disciples had gone away alone.

Jesus answered them and said, “Truly, truly, I say to you, you seek Me, not because you saw signs, but because you ate of the loaves and were filled.