1.
The Discourse on Khema
52.
"'Security, security', friend, is said.
In what way, friend, has security been spoken of by the Blessed One?"
"Here, friends, a monk, quite secluded from sensual pleasures... etc. he enters upon and dwells in the first meditative absorption. To this extent too, friends, security has been spoken of by the Blessed One by method... etc.
"Furthermore, friends, a monk, having completely transcended the plane of neither-perception-nor-non-perception, enters upon and dwells in the cessation of perception and feeling, and having seen with wisdom, his mental corruptions are utterly eliminated. To this extent too, friends, security has been spoken of by the Blessed One without qualification." The first.