成唯識論演祕 3.114

3.114

For instance, if one bīja of consciousness were held in both places, form and citta: since the perfuming is simultaneous, their potency is also equal. Later, when encountering conditions for arising, they would arise simultaneously in both places; hence two consciousnesses would arise at the same time. Although the locations are two, because it is one consciousness, it is called 'one bīja'.