Allah, the best guidance is the guidance of Muhammad, the worst matters are newly introduced ones, and every religious innovation is misguidance.”

He, may Allah bless him and grant him peace, said in the authentic hadith narrated by Muslim concerning the Farewell Pilgrimage:

“I am leaving among you something which, if you hold fast to it, you will never go astray: the Book of Allah Most High.”

An authentic report states:

“ʿAbd Allāh ibn Abī Awfā was asked, ‘Did the Messenger of Allah, may Allah bless him and grant him peace, leave any bequest?’

He replied, ‘No.’

He was asked, ‘Why not, when people have been enjoined to make a bequest?’

He replied, ‘He enjoined adherence to the Book of Allah.’”

Allah Most High said:

“Mankind was one community. Then Allah sent the prophets as bearers of good tidings and warnings, and sent down with them the Scripture in truth to judge between people concerning their differences.” [al-Baqarah: 213]

And Allah Most High said:

“O you who believe, obey Allah and obey the Messenger and those in authority among you. If you disagree over anything, refer it to Allah and the Messenger.” [al-Nisāʾ: 59]

There are many similar passages.

But when a person is calling others to the truth and explaining it to them, or engaging in reflection, he must likewise hold fast to the Book and the Sunnah and call others to them. He may also speak in conjunction with