YV 4.7h

Six are the seasons, six the Prsthas; verily by the Prsthas they mount upon the seasons, by the seasons upon the year; verily in the year they find support. There are twelve Ekavinças, for support; verily they place radiance in themselves [2]. There are many Sodaçins, for conquest. There are six (days) with the Açvina (Çastra), six are the seasons; verily they rest on the seasons. These nights are deficient and redundant. They are deficient in that they are fifty less one, redundant in that they are (one) more than forty-eight. Both from the deficient, indeed, and from the redundant Prajapati was propagated. Those who desire offspring and cattle should perform (the rite of) these nights; verily are they propagated with offspring and cattle. This sacrifice is connected with the Viraj because it is one of forty-nine (nights). Those, who knowing thus perform (the rite) of forty-nine nights, attain the Viraj, and become eaters of food. There are Atiratras on either side, for the securing of food. Those who are about to consecrate themselves for the year (rite) should consecrate themselves on the Ekastaka. The Ekastaka is the wife of the year; on that night he dwells with her; verily they consecrate themselves grasping openly the year. Those who consecrate themselves on the Ekastaka consecrate themselves in the troubled part of the year, for then are the two months called the end. Those who consecrate themselves on the Ekastaka consecrate themselves on the torn part of the year, for them are the two seasons called the end. They should consecrate themselves on the full moon in Phalguni. The full moon in Phalguni is the beginning of the year [1]; verily they consecrate them selves grasping the year at its beginning. To that there is this one objection that the Visuvant day falls in the cloudy season. They should consecrate themselves on the full moon in Citra.