The Moon - 54:9
"The people of Noah had denied before them. They denied Our servant and said, "He is mad". Indeed he was prevented."
The disbelievers called Prophet Noah mad:
The Believers/23:23
"We sent Noah to his people and he said: "My people, worship Allah. You have no god but Him. Will you not respect Him and act righteously?"
The Believers/23:24
"The prominent disbelievers of his people said, "This is nothing but a man like you. He wants to rule over you. Had Allah willed, He could have sent down an angel. We did not hear anything like this from our first ancestors."
The Believers/23:25
He is only a mad man. Observe him for a while.
The Believers/23:26
"He said, "My Lord, help me against their denying me."