Anandakanda 1.4.132

1.4.132

dvaṃdvitaṃ vajrabījaṃ ca cāraṇāyāṃ vidhīyate /
samastametatpūrvoktaprakāreṇaiva kārayet //

as well as paired diamond seed, are prescribed for assimilation. / One should prepare all of these in the very manner stated previously;