"Your Companion is neither astray nor being misled. Nor does he say (aught) of (his own) Desire. It is no less than inspiration sent down to him He was taught by One mighty in power ."
(Qur'an: Translation of the meaning, 53:2-5)
The Sunna, the practice and example of the Prophet (pbuh), is the second authority for Muslims. A Hadith is a reliably transmitted report of what the Prophet said, did, or approved. Belief in the Sunna is part of the Islamic faith.