Rasamanjari 4.17

4.17

ṣaṣṭhe ca saptame caiva kramavṛddhyā vivardhayet /
saptasarṣapamātreṇa prathamaṃ saptakaṃ bhavet //

and on the sixth and seventh days, one should increase it by gradual increase. / With a dose of seven mustard seeds, the first seven-day period is completed.