長阿含經 6.p58

6.p58

“When they lived five hundred years, sentient beings again produced three bad actions, which were 1. lust and 2. greed that go against Dharma and 3. wrong views. As these three bad actions developed and prospered, people’s lifespans were reduced to three hundred and then two hundred years. During our time, people reach a hundred years, with a few going beyond that and many living for less than that. Thus they evolved, and their evils didn’t stop, so their lifespans were reduced until they reached ten years.