Moses had already assigned the land east of the Jordan to the other two and one-half tribes. (The descendants of Joseph were divided into two tribes: Manasseh and Ephraim.) However, Moses gave the Levites no portion of the territory. Instead, they received cities to live in, with fields for their cattle and flocks. 1
References for Joshua 14:3
14.3, 4 Nu 32.33; 34.14, 15; Dt 3.12-17.