10 days, 21 hours, and 204 parts are the excess of the days of the solar year over the days of the lunar year; and the intercalation is introduced to equalize the days of the solar || year with the days of the lunar year. The sun and the moon begin (their courses) at the new moon of Nisan, the sun goes before the moon at its Teḳuphah; and Aries begins to serve before it by day, and all the constellations serve thereafter according to their order.
The moon goes in the opposite direction and Aries begins to serve before it by night, and all the constellations serve thereafter according to their order, until the year of the small cycle, until the year of intercalation (comes round). (When) the intercalated month comes round it supersedes (or thrusts aside) the new moon (of Nisan) and remains at the new moon of Shebaṭ, and so on until the twelve intercalated months (come round) when the sun and the moon are equal (again) at the commencement of the eve of the fourth day in the hour of Saturn in the hour when they were created. Between each Molad (conjunction of the moon and sun) there are only 36 hours, 40 minutes, and 73 minims (parts).