Significance of Leg of thy ka
The keyphrase "Leg of thy ka" relates to Unas in both Egyptian and Greek contexts. In Egyptian, it is described as being before and behind Unas. Similarly, in Greek recitations, it's mentioned as being before and behind Unas. Furthermore, it is identified as a component of Unas' spiritual essence in a Greek salutation, again emphasizing its presence both before and behind Unas.
The below excerpts are indicatory and do represent direct quotations or translations. It is your responsibility to fact check each reference.
Classical concept of 'Leg of thy ka'
From: The Liturgy of Funerary Offerings
(1) A part of a spiritual essence mentioned in a salutation to Unas, described as being both before and behind them.[1] (2) This is mentioned in the recitations, referring to being both before and behind the entity, in relation to Unas.[2]
From: The Book of the Dead
(1) It is mentioned in the context of Hail, Unas, where it is described as being before and behind.[3]