Tafsir of Al-Kahf 18:10

(Remember) when the young men fled for refuge to Al-Kahf. They said: "Our Lord! Bestow on us mercy from Yourself, and facilitate for us our affair in the right way!'' Here Allah tells us about those young men who fled from their people for the sake of their religion, fearing persecution. So they fled taking refuge in the cave of a mountain, where they hid from their people. When they entered the cave, they asked Allah to show mercy and kindness towards them,

ربنا آتنا من لدنك رحمة وهيي لنا من أمرنا رشدا

Our Lord! Bestow on us mercy from Yourself, and facilitate for us our affair in the right way.

ربنا آتنا من لدنك رحمة

Our Lord! Bestow on us mercy from Yourself, meaning, `give us Your mercy and conceal us from our people.'

وهيي لنا من أمرنا رشدا

and facilitate for us our affair in the right way. means, direct our matter well, i.e., grant us a good end. As was reported in the Hadith:

وما قضيت لنا من قضاء فاجعل عاقبته رشدا

Whatever You have decreed for us, make its consequences good

فضربنا على آذانهم في الكهف سنين عددا