仁王經疏 1.306

1.306

釋曰：第二、信受無上，此即挍量歎勝。言於恒河沙三千大千國中者，盛寶之處。一妙高山等，數滿至千，名為小千。即此小千，數滿至千，名為中千。即此中千，數滿至千，名為大千。《智度論》云「二過復三，故言三千。三千重數，故名大千。」若廣分別，如《深密記》。謂前七寶施等，令得信行等七賢、預流等四果，不說空故，所以福少；此經說空，令諸眾生得大菩提，故知勝也。

Commentary: Second, the unsurpassable faithful reception; this is a comparative evaluation praising its superiority. The phrase "in three-thousand great-thousand lands as numerous as the sands of the Ganges" refers to the place where treasures are contained. One Mount Sumeru and so forth, multiplied up to a thousand, is called a small-thousand [world]. This small-thousand [world], multiplied up to a thousand, is called a medium-thousand [world]. This medium-thousand [world], multiplied up to a thousand, is called a great-thousand [world]. The Dazhidulun states: "Multiplying by a thousand occurs three times, hence it is called three-thousand. Because three-thousand is a triple count, it is called a great-thousand [world]." For an extensive distinction, see the Commentary on the Saṃdhinirmocana-sūtra. The previous giving of the seven treasures and the like causes one to attain the seven worthies, such as those practicing with faith, and the four fruits, such as stream-enterer; because it does not speak of emptiness, its merit is small. This sūtra speaks of emptiness and causes sentient beings to attain great bodhi, hence we know it is superior.