成唯識論述記 2.836

2.836

述曰：此種子者，習氣異名，習氣之法必由熏有，如胡麻中所有香氣，華熏故生。西方欲作塗身香油，先以香華和於苣勝聚之一處，令便極爛，後以押油，油遂香馥。故《攝論》第二，說華熏苣勝，非華習氣不熏苣勝，苣勝之氣而是本有，故諸習氣必由熏生，此即理也。次第三、引經證也。

The Commentary states: 'Seeds' is an alternative name for seed-energies (vāsanā). The dharma of seed-energy must exist through perfuming, just as the fragrance in sesame seeds arises because flowers perfume them. In the Western regions, when they want to make fragrant oil for anointing the body, they first blend fragrant flowers with sesame seeds and gather them in one place, letting them become thoroughly macerated; later they press out the oil, and the oil becomes richly fragrant. Therefore, the second fascicle of the Mahāyānasaṃgraha states that flowers perfume sesame seeds; it is not that the flower's fragrance does not perfume the sesame seeds and the fragrance of the sesame seeds is innate. Therefore, all seed-energies must arise from perfuming; this is the reasoning. Next is the third part, citing sūtra proof.