And His saying: "And We shall admit them into a deep, cool shade." Al-Hasan said: It means: everlasting. [Verses 58-59]
وَقَوله: ﴿وندخلهم ظلا ظليلاً﴾ قَالَ الْحسن: يَعْنِي: دَائِما. [آيَة ٥٨ - ٥٩]