The Repentance - 9:80 Either ask forgiveness for them or do not ask forgiveness. Even if you ask forgiveness for them seventy times, Allah will not forgive them. For they have denied Allah and His messenger. Allah does not guide the people who have gone astray.
How did they deny the Prophet Muhammad?
The Criterion/25:4 "Those who disbelieved said, "This is nothing but a lie invented by him with the help of others"."
The Criterion/25:5 "They said, "What he writes is the fables of the ancients, dictated to him day and night."
The Criterion/25:7 "And they said, "How is it that this messenger eats and walks in the markets? Why should not an angel have descended with him as a warner?"
The Criterion/25:8 "Or if a treasure had been thrown to him, or if he had a garden and he ate from it!"Even the wrongdoers said, "You are following a bewitched man"."
The Criterion/25:9 Look what examples they have given for you and they have gone astray, and they will never find the way.

The Night Journey/17:47 "We know well how they hear when they listen to you, and how they say among themselves, "You are only following a bewitched man"."

The Heights/7:184 Do they not think? There is no madness in his companion. He is only a clear warner.

Prophet Hud/11:12 "Perhaps your chest will be constricted and you will abandon some of what has been revealed to you because they say, "Should not a treasure have descended to him, or an angel with him?"You are only a warner; Allah is the Controller of all things."

The Prophets/21:36 "When the disbelievers (those who cover the truth) see you, they do not react except to make you the target of their mockery, saying, "Is this the one who talks about your gods?"They completely deny the message of the Most Merciful."

The Criterion/25:41 "Whenever they see you, they ridicule you: "Is this the one whom Allah has sent as a messenger?"

Those Who Set The Ranks/37:35 "When it was said to them: "La ilaaha illa Allah", they were arrogant."
Those Who Set The Ranks/37:36 "They used to say: "Shall we abandon our gods for a mad poet?"

The Ornaments of Gold/43:31 "They said: "Should not this Qur´an have been sent down to a famous and great man from those two cities?"

The Scatterers/51:52 "Thus, whenever a messenger came to those before them, they used to say: "This is a sorcerer"or "This is a madman"."

The Pen/68:51 "When they heard the Message, the disbelievers almost ate you with their eyes. They were saying, "He is mad!"

Prophet Hud/11:35 "Do they say: "He fabricated this (this historical discussion)"(O Muhammad) Say: "If I fabricated it, I shall be responsible for my crime, and I have nothing to do with your crimes."

The Bee/16:103 "Surely we know what they say, "A man is teaching him". The language of the one they intend is a foreign language, while this is a clear Arabic language."

The Prophets/21:3 "Their hearts are reckless. The wrongdoers talked to each other in secret: "Is this man not a man like you? Are you going to be bewitched?"
The Prophets/21:4 "He said, "My Lord knows every word in heaven and earth. He is the Hearing, the Knowing. "
The Prophets/21:5 "They even said, "It is a vain imagination,"and, "He has fabricated it,"and, "He is a poet; let him bring us miracles like the messengers of old."

The Believers/23:68 Have they not examined the Word, or has something come to them which did not come to their ancestors of the past?
The Believers/23:69 Or do they disbelieve because they do not recognize the messenger sent to them?
The Believers/23:70 Or have they decided that he is mad? Yet he brought them the truth. But most of them do not like the truth.

Council/42:24 "Do they say, "Has he fabricated a lie about Allah"? If Allah wills, He can seal your heart. Allah erases falsehood and establishes truth in His words. He knows the most secret thoughts."

The Smoke/44:13 They paid no heed to the Message. Yet a clear messenger had come to them.
The Smoke/44:14 "Then they turned away from him and said, "A learned madman!"