瑜伽論記 1.24

1.24

五、顯揚論等說：信、欲、方便、精進四法，名瑜伽。此四通生一切行故。

5. The Prakaraṇāryavācāśāstra and others say: The four phenomena of faith, aspiration, expedient means, and vigor are called yoga, because these four generally generate all practices.