Restraint

The mechanic

The counterpart of idhlaq: letters that are not tip-or-lip letters and so sit more heavily on the mouth. Every letter outside ف ر م ن ل ب is ismat — the word أَحَدٌ is built entirely from them.

A place in the text

قُلۡ هُوَ ٱللَّهُ أَحَدٌ

The marked spot was located in this ayah's own text at build time — Al-Ikhlas 112:1.