. The two he-goats of Yom Kippur are essential to [the validity of] each other. The two lambs of Shavuos are essential to [the validity of] each other. The two loaves are essential to [the validity of] each other. The two arrangements are essential to [the validity of] each other. The two spoonfuls [of frankincense] are essential to [the validity of] each other. The arrangements and the spoonfuls [of frankincense] are essential to [the validity of] each other. The two kinds [of breads] of the nazir, the three [ingredients added to] the [red] cow, the four [kinds of bread] of the todah-offering, the four [species] of the lulav, and the four [ingredients] of the metzora’s purification are essential to [the validity of] one another. The seven sprinklings of the [red] cow are essential to [the validity of] one another. The seven sprinklings between the poles, and on the Curtain, and on the Golden Altar are essential to [the validity of] one another.

The seven branches of the menorah are essential to [the validity of] one another. Its seven lamps are essential to [the validity of] one another. The two [Scriptural] passages which are in a mezuzah are essential to [the validity of] each other, and even the writing of one [letter] is essential to them. The four passages which are in tefillin are essential to [the validity of] one another, and even the writing of one [letter] is essential to them. The four fringes of the tzitzis are essential to the validity of one another, as they are all four one mitzvah. R’ Yishmael says: The four of them are four mitzvos.