The cycle of intercalation is 19 years, and there are 7 small cycles therein; some of these are (separated by) 3 years, some (by) 2 years, others (are separated by) 3 or 2 years, or (by) 3, 3, and 3 years (the order of the cycles being): 3rd, 6th, 8th, 11th, 14th, 17th, and 19th years. There are two (sets) of three years' cycles.
On the New Moon of Nisan || the Holy One, blessed be He, was revealed to Moses and Aaron in the land of Egypt, and it was the 15th year of the great cycle of the moon, the 16th year of the cycle of intercalation, (and He said): "henceforward the counting devolves on you."