قَالَ هَٰذَا رَحۡمَةٞ مِّن رَّبِّيۖ فَإِذَا جَآءَ وَعۡدُ رَبِّي جَعَلَهُۥ دَكَّآءَۖ وَكَانَ وَعۡدُ رَبِّي حَقّٗا ٩٨
[Dhul-Qarnayn] said, "This is a mercy from my Lord; but when the promise of my Lord1 comes [i.e., approaches], He will make it level, and ever is the promise of my Lord true."
Translation: Saheeh International (English)
1 i.e., the Hour of Resurrection.
Each word's meaning and sound
Dhu’l-Qarnayn said: “This barrier is a mercy from my Lord. It will come between Gog and Magog and causing corruption on earth, and it will stop them from it. Then when the time which Allah has appointed for their release comes before the Final Hour, He will level it to the ground. And the promise of Allah to level it to the ground and to release Gog and Magog is established and will not be broken”.
Al-Mukhtasar in interpreting the Noble Quran