藥師經疏 1.105

1.105

經。第五橫者為水所溺　五津流所溺此人不定壽業。是沈溺眾生增上果。若遇順緣修福等資助。則不為水溺。壽命延長如其不爾則為水溺。壽命短促故為橫死。

Sūtra: "The fifth untimely death is being drowned by water."
Five: drowning in waters. This person's karma for lifespan is indefinite; it is the dominant result of submerging and drowning sentient beings. If they encounter supportive conditions such as cultivating merit to aid them, they will not be drowned by water, and their lifespan will be prolonged. If not, they will be drowned by water and their lifespan will be short; therefore it is an untimely death.