Detail of the guardians of one of the doors in chapter 144 of the Book of the Dead. On the left female guardian deity (lighter skinned) with a lion's head surmounted by two snakes and red dress holding a knife in the left hand and an ankh in the right. Next to it a male deity (darker skinned) with a human head and a false beard who also holds an ankh in each hand. They are the guardian and the messenger respectively.