(Devarim 16:11) "And you shall rejoice before the L-rd your G-d": It is written here "rejoice," and elsewhere (Ibid. 27:7) "rejoice." Just as there, the rejoicing is with peace-offerings, here, too, it is with peace-offerings.

"you, your daughter, your man-servant, your maid-servant" — in order of affection.

R. Yossi Haglili says: Three mitzvoth obtain on a festival: the festive offering (chagigah), the sacrifice of peace-offerings, viz. (27:7) "And you shall sacrifice peace-offerings and you shall eat them there"; "appearance" (re'iah), before the L-rd with a burnt-offering, viz. Shemoth 23:15); and rejoicing (simchah).

There obtains with re'iah what does not obtain with the others; with chagigah, what does not obtain with the others; and with simchah, what does not obtain with the others:

re'iah (a burnt-offering) is entirely (consumed) for the Most High;

chagigah obtains both before the Word (the giving of the Torah) and afterwards;

simchah obtains with both men and women (as opposed to the others, which obtain only with men.)

This (i.e., their uniqueness) being so, Scripture had to mention all of them (individually, their not being mutually derivable.)