三千大千土(sān qiān dà qiān tŭ) “a world system consisting of a triple-thousand great one-thousand worlds,
i.e. trichiliocosm, the whole universe”
Cf. 三千大千國土(sān qiān dà qiān guó tŭ), 三千大千世界(sān qiān dà qiān shì jiè), 三千大千界(sān qiān dà qiān jiè), 三千界(sān qiān jiè), 三千世界(sān qiān shì jiè); not found at HD. 1.177.; not found at DK. 1.159.;
22b7.如人以力磨 三千大千土 盡此諸地種 皆悉以爲墨(v)
K.157.12.trisāhasra~ ... lokadhātu~; O. 157.12.tṛsahasrra~ ... lokadhātu~; Z. 88c15.佛世界;