משנה תורה, הלכות סוכה,ו:ה-י,יב-יג, טו-טז

(5) How is the commandment of dwelling in the sukkah? That one eat, drink and live in in the sukkah all of the seven days — both during the day and during the night — in the same way that he lives at home during the other days of the year. And all seven days of Sukkot, one renders his house temporary, and his sukkah permanent; as it is stated (Leviticus 23:42), "In huts shall you dwell seven days." How is that? [If he has] beautiful vessels and beautiful bedding, [they are brought] into the sukkah. And drinking vessels, such as jugs and cups, [are also brought] into the sukkah. But eating vessels, such as pot and pans are [kept] out of the sukkah. And a candelabra [is brought] into the sukkah. But if the sukkah was small, he places it out of the sukkah.

(6) We eat, drink and sleep in a sukkah all seven [days] — whether during the day or during the night. And it forbidden to eat a meal outside the sukkah all seven [days], unless it is a casual meal — a kabeitsah or less or a bit more (of bread). One may not sleep outside the sukkah, even [for] a brief nap. But it is permissible to drink water and to eat fruits outside the sukkah. However one who is stringent upon himself and does not drink even water outside the sukkah is surely praiseworthy.

(7) Eating on the night of the first holiday in the sukkah is an obligation. Even if one ate a kazayit of bread, he has fulfilled his obligation. From then on, it is optional: [If] he wants to a eat a meal, he must dine in the sukkah; [but if] he wants to just eat fruits or parched grain all seven [days] outside the sukkah, he may eat [like that. It is] like the law of eating matsa on Passover.

(8) It is forbidden for a person to sit and eat with his head and the majority of his body inside a sukkah while his table is in his home or outside the sukkah. It is considered as if he did not eat inside the sukkah. [Rather,] the table must also be inside the sukkah. This was decreed lest one be drawn after one's table. This law applies even in a large sukkah.

(9) Throughout the seven days [of the festival], a person should read in the sukkah. However, when he attempts to comprehend what he reads in depth and appreciate its details, he should do so outside the sukkah, so that his mind will be settled.
When a person prays, he may pray inside the sukkah or outside the sukkah, as he desires.

(10) If rain descends, a person may enter his home. When is one permitted to leave [the sukkah]? When enough raindrops descend into the sukkah so that they would spoil a cooked dish - even a dish of beans - were they to fall into it.
If a person was eating in the sukkah and rain descended, and hence, he entered his home, if the rains stop we do not obligate him to return to his sukkah {that entire night} until he is finished eating.
If he was sleeping and rain descended, and hence, he entered his home, we do not obligate him to return to his sukkah that entire night should the rains cease. Rather, he may remain sleeping in his house that entire night until dawn.

(12) Whenever a person enters a sukkah with the intention of sitting down throughout the seven [days of Sukkot], he should recite the following blessing before sitting:

[Blessed are You...] who has sanctified us with His commandments and commanded us to dwell in the sukkah.

On the first night of the festival, one should first recite the blessing on the sukkah, and then the blessing for the occasion.
One should recite all the blessings over a cup of wine. Thus, one should recite kiddush while standing, recite the blessing leishev basukkah, sit, and then recite the blessing shehecheyanu.
This was the custom of my teachers and the Rabbis of Spain: to recite kiddush while standing on the first night of the Sukkot festival, as explained.

(13) At present, when we celebrate holidays for two days, we dwell in the sukkah for eight days. On the eighth day, which is the first day of the holiday of Shemini Atzeret, we dwell in the sukkah, but do not recite the blessing leishev basukkah.
Similarly, a tumtum and an androgynous never recite the blessing leishev basukkah, because their obligation [to perform the mitzvah is based] on doubt, and a blessing is never recited when one is doubtful [of one's obligation].

(15) A person who did not construct a sukkah [before the holiday] - whether intentionally or unintentionally - should construct a sukkah on Chol Hamo'ed. One should even construct a sukkah on the final moments of the seventh day, because its mitzvah lasts throughout the seventh day.
The wood with which the sukkah was constructed is forbidden [to be used for other purposes] on all eight days of the festival. This applies to both the wood used for the walls and the wood used for the s'chach. Throughout [these] eight days, no benefit may be derived from it for other purposes.
[They are prohibited on the eighth day] because the sukkah is muktzeh the entire seventh day, including the period beyn hash'mashot. Since it was muktzeh during the period beyn hash'mashot, it is muktzeh on the entire day [that follows].

(16) Similarly, it is forbidden to take from the food and beverages that were hung in the sukkah as decorations for all eight days [of the festival]. However, if at the time one hung [the decorations], he made the condition: "I will not refrain from using them during the entire period of beyn hash'mashot," he is entitled to use them whenever he desires, because he did not set them aside, nor did the sanctity of the sukkah encompass them, nor are they considered part of it.