Tafsir of Al-`Ankabut 29:43

And these are the examples We give for mankind; but none will understand them except those who have knowledge. meaning, no one understands them or ponders them except those who are possessed of deep knowledge. Ibn Abi Hatim recorded that `Amr bin Murrah said, "I never came across an Ayah of the Book of Allah that I did not know, but it grieved me, because I heard that Allah says:

وتلك اﻻمثال نضربها للناس وما يعقلها إﻻ العالمون

And these are the examples We give for mankind; but none will understand them except those who have knowledge.''