Al-Kahf 18:83

Wayas-aloonaka AAan thee alqarnayniqul saatloo AAalaykum minhu thikra

And they ask you, [O Muḥammad], about Dhul-Qarnayn. Say, "I will recite to you about him a report."

They ask you about Dhul-Qarnain. Say, “I shall now recite to you an account of him.”