תלמוד על בבא בתרא 3:5

MISHNAH: One does not raise sheep and goats in the Land of Israel⁹¹Since they eat anything they see, if raised near agricultural land they would eat any crop and any sapling and their owner would by necessity become a robber, robbing farmers of their crops. but one raises them in Syria⁹²Which has plenty of empty spaces. and in the non-arable tracts⁹³מִדְבָּר, from Aramaic דבר “to lead”, is a place where sheep are lead to graze because it is not agricultural land. For such a “desert” in a non-desert region cf. Gen. 37:22; the word is also used for the grasses which sheep find in the prairie, Targum Onqelos to Ex. 3:1. in the Land of Israel. One does not raise chickens in Jerusalem because of the sacrifices⁹⁴Chickens were always kept in the open. They dig up all kinds of things; in Jerusalem they might dig up the remains of a human bone. This is incompatible with the duty to eat “simple sancta” all over the walled city of Jerusalem., nor may Cohanim in the Land of Israel do so because of purities⁹⁵They have to be pure in order to eat heave; chickens would present too great a risk.. A Jew may not raise pigs, and a person should not raise a dog unless it is tied by a chain. One does not set traps for pigeons unless thirty stadia⁹⁶A parasang (5523m). Since a parasang in the Talmudim is usually identified with 4 mil, this would make the mil 1281m and the underlying cubit 64cm. It is assumed that at this distance no pigeons which are private property can be found. distant from any settlement.