Rȝ — the mouth
Instrument of utterance — primary organ of heka
Rȝ — the mouth. The primary instrument of heka, since heka operates through spoken (or chanted) authoritative speech. The 'Opening of the Mouth' ritual (Coffin Texts spells and Book of the Dead spell 23) is the foundational mortuary ceremony for restoring the dead's capacity to speak heka in the next world. To know the spells but lack the use of the mouth (as the unanointed dead) is to be magically powerless; the mouth is therefore both target and instrument of ritual.
Point 1 of 5 in Egyptian Heka — Words of Power
Cross-tradition overlaps
No overlapping points are registered for this point.
Sources
Book of the Dead, spell 23 (Opening the Mouth of N) (primary_canonical)
Faulkner's Ancient Egyptian Book of the Dead, Spell 23, 'The spell for opening the mouth of N,' is the mortuary mouth-opening rite: it restores the deceased's mouth, speech, and capacity to receive and utter ritual words.
Ritner, Mechanics of Ancient Egyptian Magical Practice (secondary)