Anandakanda 1.9.164

1.9.164

palāśapuṣpasvarasairdinaṃ mardyaṃ ca saṃpuṭe /
ruddhvā kukkuṭake paścāttamādāyātha bhāvayet //

It should be ground for a day with fresh juice of palāśa flowers, closed in an earthen container, / and then heated in a kukkuṭa pit. Taking it out, one should then impregnate it;