Anandakanda 1.15.78

1.15.78

pratyekaṃ karṣamātraṃ syātpratyahaṃ ca pibellaghu /
ekaviṃśaddinādūrdhvaṃ medhāvī śrutadhārakaḥ //

each should be one karṣa in measure, and he should drink it daily at a light meal. / After twenty-one days he becomes intelligent, retaining whatever he hears.