佛說佛名經 17.36

17.36

佛告摩訶男：「汝今諦聽！當為汝說。比丘！東方恒河沙世界，南方恒河沙世界，西方恒河沙世界，北方恒河沙世界，上下四維恒河沙世界。彼一切世界，下至水際上盡有頂滿中微塵。比丘！於意云何？彼如是微塵可知數不？」

The Buddha said to Mahānāma: "Listen closely now, and I will explain it for you. Bhikṣu, consider the worlds as numerous as the sands of the Ganges in the east, the worlds as numerous as the sands of the Ganges in the south, the worlds as numerous as the sands of the Ganges in the west, the worlds as numerous as the sands of the Ganges in the north, and the worlds as numerous as the sands of the Ganges in the nadir, zenith, and four intermediate directions. In all those worlds, from down to the water limit up to Bhavāgra, they are completely filled with fine dust motes. Bhikṣu, what do you think? Could the number of those fine dust motes be known?"