﴿ إِذْ يُغَشِّيكُمُ ٱلنُّعَاسَ أَمَنَةًۭ مِّنْهُ وَيُنَزِّلُ عَلَيْكُم مِّنَ ٱلسَّمَآءِ مَآءًۭ لِّيُطَهِّرَكُم بِهِۦ وَيُذْهِبَ عَنكُمْ رِجْزَ ٱلشَّيْطَٰنِ وَلِيَرْبِطَ عَلَىٰ قُلُوبِكُمْ وَيُثَبِّتَ بِهِ ٱلْأَقْدَامَ ﴾

“[Remember how it was] when He caused inner calm to enfold you, as an assurance from Him, and sent down upon you water from the skies, so that He might purify you thereby and free you from Satan's unclean whisperings and strengthen your hearts and thus make firm your steps.”

Remember when He caused slumber to overcome you as security against the fear that had befallen you from Him from God and sent down upon you water from the heaven to purify you thereby from minor and major ritual impurities; and to remove from you the evil of Satan his whisperings to you that had you been on the right path you would not have been thirsty and impure while the idolaters enjoyed access to water; and to strengthen to seal your hearts with certainty and endurance; and to make firm your feet lest they sink in the sand.