法界次第初門 2.46

2.46

六、無所有處背捨。若捨識，一心緣無所有入定時，即觀此定依陰、入、界，故有無常、苦、空、無我，虛誑不實，心生厭背而不受著，深入一向不迴，是為無所有處背捨也。

Sixth, the liberation of the sphere of nothingness. If, casting off consciousness, one single-mindedly takes nothingness as object upon entering concentration, one then contemplates that this concentration relies on the skandhas, āyatanas, and dhātus, and therefore is impermanent, suffering, empty, non-self, deceptive, and unreal; generating a mind of revulsion and turning away, one does not cling to or attach to it, but enters deeply and single-mindedly without turning back—this is the liberation of the sphere of nothingness.