Sura 50 The letter Qaaf (Qaf), aya 40

1. وَمِنَ اللَّيْلِ فَسَبِّحْهُ وَأَدْبَارَ السُّجُودِ

   And (in part) of the night exalt Him and after prostration.

   50:40

Tafsiri: Saheeh International