The Pyramid Texts of Unis mention two skies and two banks / shores (PT 273-4 §406c):

jw dbn n.f ptj tm.tj jw pXr n.f jdbwj


J.P. Allen 2017: “both skies now circle for me and the two shores (jdbwj) now serve me.”

C. Eyre 2002: “He has gone round (dbn) the Two Skies complete; he has circumambulated (pXr) the Two Banks” or “The complete Two Skies go round for him; the Two Banks go about for him.”

R.O. Faulkner 1969: “He has travelled around the whole of the two skies, He has circumambulated the Two Banks.”

The ‘two banks’ or ‘two shores’ is the land of Egypt either side of the Nile.

jdb (singular) is 'river bank'; jdbw (dual) refers to both banks either side of river Nile or both shores of the annual inundation.

Egyptian Dictionary I, Hannig 2003, translates jdbwj as 'The Two Banks' (Egypt).

Chris