成唯識論述記 3.108

3.108

述曰：唯華熏苣勝同生、同滅，故以為喻，《攝論》喻如內熏習等。

The Commentary states: Only the sesame seeds perfumed by flowers arise and cease together simultaneously; therefore it is taken as an analogy. The Mahāyānasaṃgraha provides analogies such as internal perfuming and so forth.