민수기 15:18의 Halakhah

We are not obligated in challah from the Torah other than in the land of Israel alone, as it is said: "and it shall be that when you eat from the bread of the land..." (Num. 15:19). And [it applies] at a time that all of Israel is there, as it is said: "when you [plural] come" (Num. 15:18) - the coming of all of you and the coming of some of you. Therefore, [the obligation of ] challah at this time - even in the days of Ezra in the land of Israel - is only from their [i.e. the Sages'] words [i.e. it is of Rabbinic force only].

The commandment of fringes (tsitsit): To put fringes on the clothes that we wear, as it is stated (Numbers 15:18), "and they shall make fringes for themselves." And this obligation applies to garments with four or more corners, as it is written (Deuteronomy 22:12), "on the four corners of your garment." And 'four' includes five or more (Mishneh Torah, Laws of Fringes 3:1), provided that the garment is large enough that the head and most of the body of a child who is old enough to walk unescorted in the marketplace can be wrapped in it. And it seems that this age is around six or seven years old. The garment must be made of wool or linen to be obligated in fringes when it is worn. If it is missing one of these [conditions], i.e. if it has fewer than four corners or is not as large as described, or it is made from some other material, it is exempted from fringes on a Torah level. Garments of silk, and even camel hair, rabbit hair, and goat hair are all exempted from fringes on a Torah level; as 'garment' in the Torah [refers] only to those made from sheep's or lamb's wool or linen, and so [too] in relation to tsara'at of clothing, as I have written in its place (Sefer HaChinukh 172).

And the commandment of the priestly tithe - also the commandment of the tithes - is practiced from Torah writ in the Land of Israel and at the time that Israel is there. And so wrote Rambam, may his memory be blessed, at the end of the first chapter of the Laws of Heave Offerings (Mishneh Torah, Laws of Heave Offerings 1:26), and this is his language, "The priestly tithe at this time is not from Torah writ, but [rabbinic] - even in a place that those that came up from Babylonia held, and even at the time of Ezra - as you do not have the priestly tithe from the Torah except in the Land of Israel at the time that all of Israel is there, as it is stated, 'When you come' (seemingly a reference to Numbers 15:18, which has, 'In your coming') - the coming of all of you, like they were at the first possession, and like they are to return in the future for the third possession, and not like they were at the possession in the days of Ezra, which was a coming of some of them - and hence it was not from the Torah [then]. And so does it appear to me is the law of tithes [as well], that we are only [rabbinically] obligated at this time - like the priestly tithe." To here [are his words]. And Raavad, may his memory be blessed, wrangled him about this matter and this is his language: Avraham said, "He did not conceive the law properly - as behold, we establish it [to be] like Rabbi Yochanan - as we say in Yevamot 81a, 'The priestly tithe at this time is from Torah writ' - meaning in the Land of Israel. And it appears that he, himself, wrote this at the beginning of the book. And if there is [truth] to this matter, it is in [the laws of] challah." To here [are his words]. And now if the truth is like the words of Raavad, may his memory be blessed, we would have had to count this commandment among the commandments that are practiced now in the Land from Torah writ, as well as six other commandments concerning the priestly tithe in the Order of Emor (Sefer HaChinukh 279-284) and one in the Order of Mishpatim (Sefer HaChinukh 72); and two in the Order of Vayikach Korach - the tithe and the tithe from the tithe (Sefer HaChinukh 395-6). But [as for] me, I will set the words of Rambam, may his memory be blessed, between my eyes and from his well shall I draw - as he is the reason for all of this involvement in the counting of the commandments, for me and for all who came after him. And nonetheless there is none in the world that disagrees that it is also practiced rabbinically in the Land of Shinaar, since it it close to the Land of Israel, and many of Israel go to and come back from there. And they also ordained that we should practice the priestly tithes and the tithes even in the Land of Egypt and even in Land of the Children of Ammon and Moav, since they surround the Land of Israel.