Codex Borgia, pp. 27-28.
"The rain gods of the (four or five) directions and the quarters of the tonalpohualli, as well as the four kinds of years, played an important role in the cult, as did the Cuiapipiltin. . . . The mountains tlalocan are also dwelling places of gods and dead human beings."
See the companion volume by Karl Anton Nowotny, Codex Borgia, trans. C. F. Klein (Graz, 1976), p. 44.