"And by the night when it departs"—meaning when it turns away. Some of them recite: "When it departs," meaning when it turns away.
Muhammad said: It is said: The night 'dabara' and 'adbara' [departed], just as you say: 'Qabala' and 'aqbala' [approached]. It is also said: "So-and-so 'dabarani' and 'khalafani' [came after me/followed me]"—meaning when he comes after me.
"And by the morning when it shines."
﴿وَاللَّيْل إذْ أدبر﴾ إِذْ ولَّى، وَبَعْضُهُمْ يَقْرَأُ: ﴿إِذَا أَدْبَرَ﴾ إِذَا ولَّى.
قَالَ محمدٌ: يُقَالُ: دَبَرَ اللَّيْلُ وَأَدْبَرَ، كَقَوْلِكَ: قَبَلَ اللَّيْلُ وأَقْبل، وَيُقَالُ: دَبَرَنِي فلانُ وَخَلَفَنِي؛ يَعْنِي: إِذَا جَاءَ بَعْدِي.
﴿وَالصُّبْحِ إِذَا أَسْفَرَ﴾ ﴿
