Cakradatta (Cikitsasangraha) 67.13

67.13

śuddhyarthaṃ punarāhāre naiśe jīrṇe pivennaraḥ .
ahorātramahaḥ kṛtsnaṃ dinārdhaṃ ca pratīkṣate .. 13 ..

for the purpose of purification, however, a person should drink it after the evening meal has digested. / [The digestive period] waits for a whole day and night, an entire day, or half a day [according to dosage].