Ep.014: Surah al-Kahf (incl. the youths of the cave, 18:13) was revealed in response to the trick questions the Quraysh (via Nadr/Uqba) obtained from the Jews of Yathrib to test the Prophet ﷺ.
“Say, [O Prophet,] "I am only a man like you"”
This is the closing ayah of Surah al-Kahf, the very surah revealed answering the sleepers-of-the-cave question described at this event.