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

2. The later texts have ⁂⁂⁂⁂, implying the two lions Shu and

Tefnut. But the older texts have ⁂⁂⁂⁂, a single god, with a lion’s face or form. The two notions, however, are found in combination in the Pyramid texts of Unas (l. 558) and Teta (l. 332).