M. Gilula, “The Smiting of the First-Born—An Egyptian Myth?” Tel Aviv 4 (1977), p. 94. Technical references and additional discussion are available in this brief study. M. Lichtheim renders the line from the ‘Cannibal Hymn’: “Unas will judge with Him-whose-name-is-hidden on the day of slaying the eldest,” noting that the line is difficult (Ancient Egyptian Literature. A Book of Readings. Vol 1: The Old and Middle Kingdoms [Berkeley: University of California Press, 1973], pp. 36–38). The Coffin Text cited is CT VI:178.