The Compendium of Bheḷa 1.7.8

1.7.8

varṣāsu navarātrāt tu daśarātrāccharady api | pañcāhāddhemasamaye saptāhācchiśire tathā ||

in the rains after nine nights, and in autumn after ten nights; / in the winter season after five days, and likewise in the cold season after seven days;