Surah 43. Az-Zukhruf, Ayah 23

For this rendering of the term mutraf (derived from the verb tarafa), see note [147] on 11:116 .

Commenting on this passage, Razi says: "Had there been in the Qur'an nothing but these verses, they would have sufficed to show the falsity of the principle postulating [a Muslim's] blind, unquestioning adoption of [another person's] religious opinions (ibtal al -qawl bi't-taqlid ): for, God has made it clear [in these verses] that those deniers of the truth had not arrived at their convictions by way of reason, and neither on the clear authority of a revealed text, but solely by blindly adopting the opinions of their forebears and predecessors; and all this God has mentioned in terms of blame and sharp disparagement."

It is some privileged position, and not ancestral custom, which is really at the bottom of much falsehood and hypocrisy in the world. This has been again and again in religious history.