הלכה על במדבר 36:20

Tachanun is not said on the following days: Rosh Chodesh, the fifteenth of Av,¹³At one time observed as a festival for the numerous wonderful events of this day: 1) The day that God’s decree that 600,000 of those that came into the wilderness shall die before the Jews enter Eretz Yisrael, ended. 2) The day that it became permissible for Jewish women to marry into other tribes of Israel (see Numbers 36:6–9). Also it was the day that the Tribe of Benyamin was again permitted to intermarry with the other tribes of Israel, after being ostracized for a period of time. 3) Jerobaam, the king, had posted soldiers for many years not allowing the Jews their pilgrimages to Jerusalem for the Three Festivals. Hosea, King of Israel, opened the roads to Jerusalem on Av 15. 4) When the Second Temple was completed the land was totally desolate, so much so, that no wood could be found for burning on the Altar. Many Jews jeopardized their lives and disobeyed the authorities and brought wood for the Altar. The day when cutting this wood was completed was Av 15. the fifteenth of Shevat,¹⁴The New Year for the fruits of trees, i.e. the determinant as to which year’s tithes one is obligated to donate each year is Shevat 15. during Chanukah, the two days of greater Purim,¹⁵I.e. Purim and Shushan Purim. the two days of minor Purim,¹⁶When there is a leap year in the Hebrew calendar and an extra month—Adar I is added, then Greater Purim is celebrated on 14 and 15 Adar II and the Minor Purim during Adar I. the thirty-third day of the Omer,¹⁷The day that the plague that decimated Rabbi Akiva’s disciples ended. during the entire month of Nissan,¹⁸The month of the Exodus and the Pesach observance. Tishah Be'Av,¹⁹The day of the destruction of both Temples, which will become a joyous holiday when the Mashiach comes. the days between Yom Kippur and Sukkos, from Rosh Chodesh Sivan until the day following the day after Shavuos,²⁰The days of preparation for and receiving of the Torah at Mount Sinai. the day following Succos.²¹The day following a festival is still somewhat festive. On all these days tachanun is also not said at minchah on the preceeding days. However, on the day before erev Rosh Hashanah, and on the day before erev Yom Kippur, Tachanun is said at Minchah. On the day before Rosh Hashana [tachanun] is said at selichos, but after that²²I.e. at Shacharis of Erev Rosh Hashanah. [tachanun] is omitted.

Fields of holding are those that came as an inheritance to each Israelite in the division of the Land, as well as anyone who merited and had his holding added to, due to shifts in the possession by a daughter that inherits possession. As it is a well-known thing that "and the possession should not move" (Numbers 36:7), was only stated about that generation alone. These are the ones called the fields of holding, and their laws are a novelty from the Torah - differing from other lands for the purposes of redemption: As a field of holding can be redeemed by the seller or its redeemer after two years, against the will of the buyer; whereas other fields - which are called a purchased field - can only be redeemed with the buyers consent, [or else] they stay with the buyer until the Jubilee.