Word by Word Analysis

وَلَا تَنفَعُ ٱلشَّفَـٰعَةُ عِندَهُۥٓ إِلَّا لِمَنْ أَذِنَ لَهُۥ ۚ حَتَّىٰٓ إِذَا فُزِّعَ عَن قُلُوبِهِمْ قَالُوا۟ مَاذَا قَالَ رَبُّكُمْ ۖ قَالُوا۟ ٱلْحَقَّ ۖ وَهُوَ ٱلْعَلِىُّ ٱلْكَبِيرُ 23

And intercession does not benefit with Him except for one whom He permits. [And those wait] until, when terror is removed from their hearts, they will say [to one another], "What has your Lord said?" They will say, "The truth." And He is the Most High, the Grand.