[There are] three lands [in Eretz Yisrael] in regard to chazakah: Judea, Transjordan, and the Galilee. [If] he was in Judea and [another] took possession in the Galilee, [or he was] in the Galilee and [another] took possession in Judea, it is no chazakah, until he is with him in the [same] province. R' Yehudah said: They said three years only so that [in case[ one is in Spain and [another] takes possession [of the field] for one year, they have one year to travel and notify him, and he can return the following year.