Muḥammad

وَالَّذِينَ اهْتَدَوْا زَادَهُمْ هُدی وَآتَاهُمْ تَقْوَاهُمْ

17. While as for those who accept Guidance, He increases their guidance and bestows on them their piety.

Accepting Divine Guidance by man leads to Its increase by God. Piety is the Divine Reward bestowed upon those who accept the Guidance;

(“[He] bestows on them their piety”).

The Verse refers to the guided whose guidance is increased upon listening to the Revelation through which the truth of piety and the light of knowledge illuminate their hearts leading them from the shadows of ignorance to the light of knowledge.