百年に一度だけ水面に浮上する盲亀が、水に漂う軛の一つの穴に首を通すことのほうが、悪趣に堕ちた愚者が人間として再生することよりもまだたやすいと説く経。

A discourse teaching that it is more likely for a blind turtle, surfacing only once every hundred years, to put its neck through the single hole of a floating yoke than for a fool who has fallen into the lower realms to be reborn as a human being.