Tafsir of Al-Ahqaf 46:1-3

{Except with the truth} Meaning: except as a creation characterized by wisdom and a valid purpose.

(And) with the estimation of {a specified term} Meaning: an end point to which it reaches, which is the Day of Resurrection.

{But those who disbelieve, from that of which they are warned} Meaning: from the terror of that Day, which every created being must inevitably reach.

{are turning away} Meaning: they do not believe in it, nor do they concern themselves with preparing for it. It is also permissible that ma (in ‘amma) is an infinitive particle (masdariyyah), meaning: turning away from the warning given to them regarding that Day.

{Say, "Have you considered that which you invoke besides Allah? Show me what they have created of the earth, or do they have partnership in the heavens? Bring me a scripture [revealed] before this, or a remnant of knowledge, if you should be truthful."}