At-Takwir 81:21

<h2>The Explanation of the Words Al-Khunnas and Al-Kunnas</h2><p>Muslim recorded in his Sahih, and An-Nasa'i in his Book of Tafsir, in explaining this Ayah, from `Amr bin Hurayth that he said, "I prayed the Morning prayer behind the Prophet , and I heard him reciting,</p><p>فَلاَ أُقْسِمُ بِالْخُنَّسِ - الْجَوَارِ الْكُنَّسِ - وَالَّيْلِ إِذَا عَسْعَسَ - وَالصُّبْحِ إِذَا تَنَفَّسَ</p><p>(But nay! I swear by Al-Khunnas, Al-Jawar Al-Kunnas, and by the night when it `As`as, and by the day when it Tanaffas.)" Ibn Jarir recorded from Khalid bin `Ar`arah that he heard `Ali being asked about the Ayah; (لَا أُقْسِمُ بِالْخُنَّسِ. الْجَوَارِ الْكُنَّسِ) (Nay! I swear by Al-Khunnas, Al-Jawar Al-Kunnas.) and he said, "These are the stars that withdraw (disappear) during the day and sweep across the sky (appear) at night." Concerning Allah's statement,</p><p>وَالَّيْلِ إِذَا عَسْعَسَ</p><p>(And by the night when it `As`as.) There are two opinions about this statement. One of them is that this refers to its advancing with its darkness. Mujahid said, "It means its darkening." Sa`id bin Jubayr said, "When it begins." Al-Hasan Al-Basri said, "When it covers the people." This was also said by `Atiyah Al-`Awfi. `Ali bin Abi Talhah and Al-`Awfi both reported from Ibn `Abbas:</p><p>إِذَا عَسْعَسَ</p><p>(when it `As`as) …

(One) to be obeyed, and trustworthy;

With authority there, (and) faithful to his trust.

Obeyed (by the angels), trustworthy there (in the heavens).

Obeyed and honest.