一切經音義 22.284

22.284

各若干微塵（漢書胡廣曰若順也干求也當順所求而與之故謂若干也顏古曰若干且設數之語也干猶箇也謂當如此數耳也）。

As many as [the atoms of] fine dust (ge ruogan weichen; Hu Guang in the Hanshu says: 'Ruo means to accord with; gan means to seek. One accords with what is sought and gives it, hence it is called ruogan [so many].' Yan Shigu says: 'Ruogan is merely an expression setting a quantity; gan is like ge [units], meaning that it should be just this amount').