This [Qur'an] is enlightenment for mankind and guidance and mercy for a people who are certain [in faith].
The Saheeh International Quran Translation
هَٰذَا بَصَٰٓئِرُ لِلنَّاسِ وَهُدًى وَرَحْمَةٌ لِّقَوْمٍ يُوقِنُونَThis [Qur'an] is enlightenment for mankind and guidance and mercy for a people who are certain [in faith].