佛垂般涅槃略說教誡經 1.13

1.13

「汝等比丘，求善知識、求善護助而不忘念；若不忘念者，諸煩惱賊則不能入。是故汝等常當攝念在心，若失念者則失諸功德。若念力堅強，雖入五欲賊中不為所害，譬如著鎧入陣則無所畏。是名不忘念。

“You monks, seek good friends and seek good protection and support without losing mindfulness. If you do not lose mindfulness, the bandits of affliction cannot enter. Therefore, you should always gather mindfulness in your mind; if you lose mindfulness, you will lose all merits. If the power of mindfulness is strong and firm, even if you enter among the thieves of the five desires, you will not be harmed by them, just as one who puts on armor to enter battle has nothing to fear. This is called not losing mindfulness.