نَحْنُ نَقُصُّ عَلَيْكَ نَبَاَهُمْ بِالْحَقِّۗ اِنَّهُمْ فِتْيَةٌ اٰمَنُوْا بِرَبِّهِمْ وَزِدْنٰهُمْ هُدًىۖ ( الكهف: ١٣ )
Nahnu naqussu 'alaika naba ahum bilhaqq; innahum fityatun aamanoo bi Rabbihim wa zidnaahum hudaa (al-Kahf 18:13)
It is We who relate to you, [O Muhammad], their story in truth. Indeed, they were youths who believed in their Lord, and We increased them in guidance. (Al-Kahf  : 13)
1 Mufti Taqi Usmani
We narrate to you their story with truth. They were young men who believed in their Lord and We gave them more guidance.