SN 15.3 Assu Sutta: Tears
“From an inconceivable beginning comes the wandering-on. A beginning point is not discernible, though beings hindered by ignorance and fettered by craving are transmigrating & wandering on. What do you think, monks? Which is greater, the tears you have shed while transmigrating & wandering this long, long time—crying & weeping from being joined with what is displeasing, being separated from what is pleasing—or the water in the four great oceans?”
The monks reply ‘the oceans’ and the Buddha agrees.
“Long have you thus experienced stress, experienced pain, experienced loss, swelling the cemeteries - enough to become disenchanted with all fabricated things, enough to become dispassionate, enough to be released.”