Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 19.2.21

19.2.21

ṣaḍḍ hy eṣa māsān udann eti / (soma: gavāmayana)

For six months he goes north, six south. They should not consecrate themselves at this time; the corn has not arrived, the days are short; shivering they come out from the final bath. Therefore they should not consecrate themselves at this time. They should consecrate themselves one day after the new moon of Caitra; the corn has come, the days are long, not shivering do they come out from the final bath. Therefore that is the rule.