長阿含經 9.p77

9.p77

“There are another four things, which are four formless samādhis: [1] Here, a monk goes beyond all notions of form, and all his previous notions of anger. Not being mindful of different notions, he contemplates the abode of measureless space. [2] Abandoning the abode of space, he enters the abode of consciousness. [3] Abandoning the abode of consciousness, he enters the abode of nothingness. [4] Abandoning the abode of nothingness, he enters the abode with and without conception.