Visuddhimagga X-10

Tassevaṃ punappunaṃ āvajjayato manasikaroto pathavīkasiṇādīsu rūpāvacaracittaṃ viya ākāse ākāsānañcāyatanacittaṃ appeti.

他如是数数念虑而作意时，如色界心之（安止）于地遍等（所缘），而空无边处心则安止于虚空（所缘）。

Ñ(X,10): As he again and again adverts to it and gives attention to it in this way, consciousness belonging to the base consisting of boundless space arises in absorption with the space [as its object], as the consciousness belonging to the fine-material sphere did in the case of the earth kasiṇa, and so on.

Idhāpi hi purimabhāge tīṇi cattāri vā javanāni kāmāvacarāni upekkhāvedanāsampayuttāneva honti.

于此（空无边）处，亦（如第四禅）以前分的三或四速行为欲界心并且是与舍相应的，

Ñ: And here too in the prior stage there are either three or four sensual-sphere impulsions associated with equanimous feeling,

Catutthaṃ pañcamaṃ vā arūpāvacaraṃ.

其第四或第五（速行）为无色界心。

Ñ: while the fourth or the fifth is of the immaterial sphere.

Sesaṃ pathavīkasiṇe vuttanayameva.

其余的地遍中所说的同样，

Ñ: The rest is the same as in the case of the earth kasiṇa (Ch. IV, §74).