大毘盧遮那成佛經疏 2.88

2.88

第五十九「云何受生心？謂諸有修習行業彼生心如是同性」者，如人由白黑業受善惡報，由所作種種雜故，受彼彼無量差別身。此心亦爾，所修諸行皆欲迴向受生，當知得果亦兼善惡也。故行者當念甄擇善惡，除去不善、純修白法。就此善中，又復以慧更去麁鑛，如是次第，乃至得成純一清淨醍醐妙果，是所對治也。

As for the fifty-ninth, “What is the rebirth-producing mind? It refers to when all cultivated karmic actions share this same nature with the mind that produces that [rebirth]”: Just as people receive good or bad retributions from white or black karma, and because what they do is mixed and varied, they receive those countless diverse bodies. This mind is also like this: all the practices it cultivates are directed toward producing rebirth; one should know that the fruits obtained will also combine good and bad. Therefore the practitioner should resolve to discern and select between good and bad, eliminate what is unwholesome, and purely cultivate white dharmas. Within this good, they should further use wisdom to remove the coarse ore, proceeding in this order until they accomplish the purely unmixed, pristine, wondrous fruit of ghee; this is the antidote.