The Holy Quran 68:7 — Surah Al-Qalam
Arabic text
إِنَّ رَبَّكَ هُوَ أَعْلَمُ بِمَن ضَلَّ عَن سَبِيلِهِۦ وَهُوَ أَعْلَمُ بِٱلْمُهْتَدِينَ
Translation
Indeed only your Rabb knows best who deviates (gone astray) from His path and only He knows those who are rightly guided (and He will reward and punish people accordingly).
Tafsir (excerpt) — Tafsir Usmani
That is, full knowledge belongs to Allah alone as to which people will come to the right path and which will go astray; but when the results appear, everyone will see who reached the goal of success and who, because Shaytan waylaid him, remained a failure, deprived of what he hoped for.
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