一部經，佛陀在憍賞彌見一段浮木順流而下，以浮木若不擱淺、不沉沒、不腐爛、不被截留即能漂抵大海，比喻比丘若能避開種種險阻便能一路趣向涅槃，牧牛人 Nanda 聞法後隨即出家。

A discourse in which the Buddha, seeing a log float down the river at Kosambī, compares a monk’s unhindered progress to nibbāna with a log that avoids grounding, sinking, rotting, or being seized along its way to the ocean, at the end of which the cowherd Nanda joins the Order.