1,211. Brothers Who Jointly Own Esrogim
Hilchos Shofar, Succah v’Lulav 8:11
If two people jointly purchase a lulav or an esrog, neither one of them can fulfill his obligation with it on the first day of Succos unless his colleague grants him his share as a gift. Let’s say that brothers buy esrogim using money from their father's estate that has not yet been divided among them, then one of them takes one of these esrogim intending to fulfill his obligation with it. In such a case, if he could eat the esrog without his brothers objecting, then he has fulfilled his obligation. If they would object, then he cannot fulfill his obligation with this esrog until they grant him their shares in it as a gift. If one of the brothers bought an esrog and another one bought a quince, or if they jointly purchased an esrog, a pomegranate and a quince using undivided funds from their father's estate, none of them can fulfill his obligation with the esrog until the others have given him their shares in it as a gift This is true even if they would not object.
Hilchos Shofar, Succah v’Lulav 8:12
Even though there is a mitzvah to rejoice on all the holidays, there were additional celebrations in the Temple for Succos as per Leviticus 23:40, “You shall rejoice before Hashem your God for seven days.” On erev Succos, they set up an area in the Temple where the women were above and the men were below, so that they would not mingle. The celebrations started on the night after the first day of Succos. On each day of chol hamoed, after offering the regular afternoon sacrifice, they would celebrate for the rest of the day and all through the night.