Mahabharata 4.13.1

वैशंपायन उवाच · vaiśaṃpāyana uvāca

वसमानेषु पार्थेषु मत्स्यस्य नगरे तदामहारथेषु छन्नेषु मासा दश समत्ययुः

vasamāneṣu pārtheṣu matsyasya nagare tadāmahāratheṣu channeṣu māsā daśa samatyayuḥ

Our plain-language meaning of this verse is waiting for scholar review.