। ॥ २२३ ॥
In plain words
Brahmacarya and the observances that go with it — these, the Veda says, are the outer limb of liberation. The six that begin with śama: just these, the wise know, are the inner limb.
Close to the Sanskrit
The śruti declares brahmacarya and the rest to be the outer limb for liberation; this very sixfold group beginning with śama the wise know as the inner limb.