The Holy Quran

"Surely those who conceal any part of the Book that Allah has revealed and take for it a small price, they eat nothing but fire into their bellies, and Allah will not speak to them on the day of resurrection, nor will He purify them, and they shall have a painful chastisement."

Prophet Muhammad (صلی اللہ عليہ وآلہ وسلم)

"When innovations take place in my ummah, it is obligatory for the a'alim to reveal his knowledge (i.e. reveal the actual facts of religion), and Allah's Curse be upon he who does not do so."

Imam Ali (عليہ السلام)

"Whoever deviates from truth because of ignorance, will always take good for evil and evil for good and he will always remain in misguidance. And whoever makes a breach (with Allah and His Messenger) his path becomes difficult, his affairs will become complicated and his way to salvation will be uncertain."

Imam Mahdi (عليہ السلام)

"As for events which will occur, turn to the scholars of our traditions, because they are my hujjat to you, while I am the Hujjat of Allah to them."