俱舍論疏 12.97

12.97

On the Śāstra's words, "Some say that in other realms ... the others should also be like this": This sets forth the assertion of the Sarvāstivādins and others. A single Buddha can universally teach throughout all ten directions, so there is only one Buddha and not two, three, or more. If in a single place sentient beings are difficult to transform and a Buddha cannot transform them, other Buddhas would also be unable to transform them therein; hence there are no multiple Buddhas.