大般涅槃經疏 2.12

2.12

次、九恒龍眾。亦為三（云云）。所召有數、類、名，奉召如文。「設諸供具」下，是順召，如文。

Next, the assembly of nine Ganges sands of nāgas. This also has three parts (and so on). Those summoned comprise number, category, and names; receiving the summons is as in the text. From "preparing various offering utensils" onward, this is complying with the summons, as in the text.