The Coffin Texts are called such because they were written on the inside of coffins in order to aid the deceased to fulfill his or her needs in the afterlife. Many of the spells derive from the Old Kingdom (ca. 2686–2181 BCE) Pyramid Texts, which were exclusively the domain of the Pharaohs, but the Coffin Texts were available to anyone who could afford a coffin (like the one pictured). Egyptologists sometimes refer to this development as the “democratization of the afterlife.”
The following translation is from R. O. Faulkner’s The Ancient Egyptian Coffin Texts. This spell is number 761 (p. 293 of “volume 2″). “N” in the text below would be replaced by the name of the deceased when he or she had the coffin painted. The deceased was thought to become an Osiris upon passing into the realm of the dead; hence Horus as the son of the deceased, Geb as the father, etc.
"TO ASSEMBLE A SPIRIT’S MEMBERS FOR HIM IN THE REALM OF THE DEAD. Wake! Wake! O N, wake! See what your son Horus has done for you, hear what your father Geb has done for you; he has set your foes beneath you for you. Go up and bathe in the Lake of Life; what is evil on you will be purged in the Lake of the Firmament. You have come into being complete as any god; your head is Re, your face is Wepwawet, your nose is the Jackal, your lips are the Twins, your ears are Isis and Nephthys, your eyes are the twin children of Re-Atum, your tongue is Thoth, your throat is Nut, your neck is Geb, your shoulders are Horus, your chest is He who pleases the spirit of Re, the great god who is in you, your flanks are Hu and Khopri, your navel is the Jackal of the Double Lion, your back is Anubis, your belly is the Double Lion, your arms are the two sons of Horus, your back is the Extender of the Sunshine, your legs are Anubis, your buttocks are Isis and Nephthys, your feet are Duamutef and Kebhsenuf, and there is no member in you which lacks a god; raise yourself, N!"