The descendants of Jethro later settled in Palestine, where the fruitful land of Jericho was allotted to them as a dwelling place. After the capture of Palestine, the tribes, by mutual consent, agreed that the fertile strip of land at Jericho should fall to the share of the tribe on whose land the Temple was to be erected. But when its erection was postponed for a long time, they agreed to allot this piece of land to Jethro's sons, because they, being proselytes, had no other possession in the Holy Land. Four hundred and eighty years did the descendants of Jethro dwell in Jericho, when, upon the erection of the Temple at Jerusalem, they relinquished it to the tribe of Judah, who claimed it as an indemnity for the site of the Temple.
Wisdom of Jethro
Legends of the Jews 2:12