一切經音義 5.275

5.275

殑伽（上漁景反取疑字上聲下魚迦反梵語西國河名也此河本出無熱惱池以砂多細故引為喻）。

殑伽 (The first character has the fanqie: 漁景反 [gǐng], taking the rising tone of the character 疑; the second character has the fanqie: 魚迦反 [gā]. This is Sanskrit [Gaṅgā], the name of a river in the Western Regions. This river originally flows out of Lake Anavatapta; because its sand is plentiful and fine, it is adduced as a simile).