Its last 10 verses. Reports about First 10 verses, are weak reports. When you apply reason that becomes clear. Last 10 verses of kahf is Summary of islam. Specifically 10th verse emphasize even prophet is nothing but a man. When any person has firm belief on prophet being nothing but a man, cannot in any possibility go astray believing some man - dajjal as his lord. Also there's hadith that prophet said if you want to understand islam/quran read 10 verses of kahf.