। ॥ १६० ॥
In plain words
At the end of waking, at the first edge of sleep, an experience of simply being shows itself. If that holds steady within you, then what you attain is advaya-ānanda — bliss with no second thing in it.
Close to the Sanskrit
Whatever experience of that state may occur at the onset of sleep, at the end of waking — if that, inwardly, should become steady, then one indeed attains non-dual bliss.