The Egyptian Book of the dead by P. Le Page Renouf and Edouard Naville

3. The oldest text must have had simply the ideographic ⁂, _Ae_ gives

⁂⁂⁂ _Ba_, but _Pd_ has ⁂⁂⁂⁂ _Ḫnemu_. The ‘living Soul’ is that of the Sun, whether he is called Râ or Osiris.