法苑珠林 43.20

43.20

又起世經云。輪王捨命必生天上。與三十三天同處共生。命終已後始經七日。七寶並皆隱沒。

Furthermore, the Lokasthiti-sūtra says: 'When a wheel-turning king relinquishes his life, he is certain to be born in heaven, born together in the same realm as the Thirty-three Heavens. After he dies, no sooner have seven days passed than the seven treasures all disappear.'