大般涅槃經義記 5.226

5.226

自下第四明佛體寂，所以無轉。然此文中意為明佛非生出等，乘舉虛空佛性類之，先就虛空明非生出，作造有為生之與出對因分別，始起名生，終現名出，作造對緣始為名作，終辯曰造，有為是總。次就如來，後就佛性。

From here below, the fourth [part] explains that the Buddha's essence is quiescent, which is why there is no turning. However, the intention of this passage is to explain that the Buddha is unproduced, non-emergent, and so forth; taking occasion to cite empty space and the buddha-nature, it analogizes them to him. It first explains with respect to empty space that it is unproduced, non-emergent, non-fabricated, unmade, and unconditioned: 'produced' and 'emergent' are distinguished with respect to causes, where the initial arising is called 'production' and the final manifestation is called 'emergence'; 'fabricated' and 'made' are distinguished with respect to conditions, where the initial action is called 'fabrication' and the final completion is called 'making'; 'conditioned' is the overarching term. Next it applies this to the Tathāgata, and finally to the buddha-nature.