That He may question the truthful about their truth.1 And He has prepared for the disbelievers a painful punishment.
Translation: Saheeh International (English)
1 i.e., that He may ask the prophets what they conveyed to their people and what response they received. "The truthful" may also refer to those who believed in the message conveyed by the prophets and imparted it to others.
Allah took this firm covenant from the prophets so He can ask the truthful Messengers regarding their truthfulness, to silence the disbelievers, and Allah has prepared for those who disbelieve in Him and His Messengers a painful punishment on the Day of Judgment, and it is the fire of hell.