一切經音義 22.6

22.6

預流（珠叢曰凡事相及為預也此中謂於見道第十六心得果捨向及聖眾行流故曰預流也）。

Yuliu 預流 [stream-enterer / srota-āpanna] (The Zhucong says: 'Whenever affairs reach and join one another, it is called yu 預.' Here it means that at the sixteenth thought-moment of the path of seeing, one obtains the fruition, abandons the preparatory orientation, and reaches the flowing stream of the practice of the assembly of āryas; hence it is called stream-enterer (yuliu)).