Samyuktagama (Sanskrit fragments) 19.12

19.12

時，彼比丘聞佛所說，心大歡喜，禮佛而退，獨一靜處，專精思惟，不放逸住，乃至心得解脫，成阿羅漢。

When that monk heard what the Buddha taught, he felt great joy. He then bowed to the Buddha and withdrew. He went alone to a quiet place where he diligently trained and lived earnestly … up to … [That monk’s] mind was liberated, and he became an arhat.