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

9. The determinative ⁂ shows that ⁂ is here to be taken in the

sense of the duration of human life, and the pronominal suffixes ⁂ or ⁂ show whose life is spoken of. The latter suffix has reference to ⁂⁂⁂⁂, which is accordingly to be translated in the singular. The plural sign merely indicates a common or collective noun.