俱舍論疏 22.105

22.105

論「又三靜慮中至能生苦故」，破苦因不定也。或下三定皆有樂受、無其苦受，三定之中生樂之因豈不決定？

On the Śāstra's 'Moreover, in the three dhyānas [...] can generate suffering': This refutes [the view that] causes of suffering are indeterminate. Alternatively, in the lower three absorptions there is only pleasant sensation and no painful sensation; within the three absorptions, how could the cause that produces pleasure not be determinate?