So Jesus raised Lazarus from the dead. Many of those who were there believed in Him. It’s not every day someone is brought back to the living like that.
But some other told the Pharisees, and their response was less than what you would expect from the people who were meant to be looking after the spiritual welfare of the Jews:
John 11:47-48 Then the chief priests and the Pharisees gathered a council and said, ‘What shall we do? For this Man works many signs. If we let Him alone like this, everyone will believe in Him, and the Romans will come and take away both our place and nation.’
It leads to this question: what were the Pharisees looking for when they asked Jesus to prove who He was by showing them a sign?