The Long Āgama Sūtra 30.46

30.46

「彼人命終，不相哭泣，莊嚴死屍，置四衢道，捨之而去；有鳥名憂慰禪伽，接彼死屍置於他方。又其土人，大小便時，地即為開，便利訖已，地還自合。其土人民無所繫戀，亦無畜積，壽命常定，死盡生天。彼人何故壽命常定？其人前世修十善行，身壞命終，生欝單曰，壽命千歲，不增不減。是故彼人壽命正等。

“When those people die, they don’t lament and cry together. They decorate the corpses, place them by an intersection, and leave them there. There’s a bird called Uccaṃgama that takes the corpses away and leaves them in other regions.

“Again, when the people of that land go to defecate or urinate, the ground opens up, and it closes back up when they are finished.

“The people of that land don’t have romantic attachments, nor do they accumulate things. Their life spans are always an exact length, and they’re born in heaven when they die. Why are their life spans always exactly the same? Those people cultivated the ten good actions in previous lives and were born in Uttarakuru after their bodies broke up and their lives ended. They live for a thousand years, no more or less. This is why those people have life spans that are an exact length.