Bereavement in Judaism as Rosh Hashanah, cancel the mourning period completely. The thirty-day period following burial (including "shiva") is known as "shloshim" (). During "shloshim", a mourner is forbidden to marry or to attend a "seudat mitzvah" (religious festive meal). Men do not shave or get haircuts during this time. Since Judaism teaches that a deceased person can still benefit from the merit of "mitzvot" (commandments) performed in their memory, it is considered a special privilege to bring merit to the departed by learning Torah in their name. A popular custom is to coordinate a group of people who will jointly study the
Milkhemet Mitzvah yet plowed their field before the war. All of these exemptions are given only in the case of "Milhemet Reshut." Talmud Scholars of both the Jerusalem and Babylonian Talmuds discussed the nature of the wars commenced by the Israelites during the biblical era (Tanakh) generally tend to describe the conquest of the Land of Israel in the Book of Joshua as Mitzvah Wars, while the wars fought by King David were meant to expand his kingdom, hence regarded as discretionary wars. Modern scholars also suggested that Mitzvah Wars originally signified a religious act. Questions about the halakhic justification for war