Word by Word Analysis

حَتَّىٰٓ إِذَا مَا جَآءُوهَا شَهِدَ عَلَيْهِمْ سَمْعُهُمْ وَأَبْصَـٰرُهُمْ وَجُلُودُهُم بِمَا كَانُوا۟ يَعْمَلُونَ 20

Until, when they reach it, their hearing and their eyes and their skins will testify against them of what they used to do.