藥師經疏 1.107

1.107

經。第七橫者至因此致死　七飢餒受終。此人不定壽業是奪眾生食增上果。若遇順緣修福等資助。飲食豐足壽命延長。如其不爾則飲食因之。壽命短促故為橫死。

Sūtra: "The seventh untimely death is... thereby resulting in death."
Seven: starvation leading to death. This person's karma for lifespan is indefinite; it is the dominant result of depriving sentient beings of food. If they encounter supportive conditions such as cultivating merit to aid them, food and drink will be plentiful and their lifespan prolonged. If not, lacking food and drink leads to a short lifespan; therefore it is an untimely death.