佛祖統紀 30.43

30.43

佛告頻婆娑羅曰。過去然燈佛滅後。有一獼猴。見羅漢入定。即取坐具披作袈裟。遶比丘行。比丘定起為說三歸五戒求菩提法。獼猴依教受已踊躍歡喜。緣樹墜死生兜率天。值一生補處菩薩為說無上道。從是以後值佛無數。於最後身。次彌勒後當成菩提。號師子月佛。今婆須密多是也（師子月佛經）。

The Buddha told Bimbisāra: "In the past, after the extinction of Dīpaṃkara Buddha, there was a monkey who saw an arhat enter concentration. He immediately took the sitting mat, draped it as a kāṣāya, and walked around the monk. The monk arose from concentration and preached to him the three refuges, the five precepts, and the method of seeking bodhi. Having received the teaching according to instruction, the monkey leaped with joy, fell from a tree, died, and was reborn in the Tuṣita heaven. Encountering a bodhisattva one birth away from Buddhahood, he had the unsurpassed Path preached to him. Thenceforth, he encountered countless buddhas. In his final body, following immediately after Maitreya, he will attain bodhi, with the title Siṃhacandra Buddha. This is none other than the present Vasumitra" (Scripture on Siṃhacandra Buddha).