Elevation

The mechanic

The back of the tongue lifts toward the roof of the mouth, which thickens the sound. Seven letters, gathered as خُصَّ ضَغْطٍ قِظْ: خ ص ض غ ط ق ظ.

Where it occurs

The seven isti'la letters

خ ص ض غ ط ق ظ

A place in the text

قَالَ لَقَدۡ ظَلَمَكَ بِسُؤَالِ نَعۡجَتِكَ إِلَىٰ نِعَاجِهِۦۖ وَإِنَّ كَثِيرٗا مِّنَ ٱلۡخُلَطَآءِ لَيَبۡغِي بَعۡضُهُمۡ عَلَىٰ بَعۡضٍ إِلَّا ٱلَّذِينَ ءَامَنُواْ وَعَمِلُواْ ٱلصَّٰلِحَٰتِ وَقَلِيلٞ مَّا هُمۡۗ وَظَنَّ دَاوُۥدُ أَنَّمَا فَتَنَّٰهُ فَٱسۡتَغۡفَرَ رَبَّهُۥ وَخَرَّۤ رَاكِعٗاۤ وَأَنَابَ۩

The marked spot was located in this ayah's own text at build time — Sad 38:24.