^Holmer, Rick (2005). The Aztec Book of Destiny (بالإنجليزية). North Charleston, South Carolina: BookSurge LLC. p. 83. ISBN:9781419611636. Archived from the original on 2019-06-13. Retrieved 2017-10-22. The provider of the Shadow Coul Tonalli for those born on Grass Malinalli is the Medicine God Patecatl who symbolizes the health and healing effects of medicinal herbs that grow from the "jaws of earth".