Reference for Bava Batra 243:1
תא שמע (במדבר כו, נו) בין רב למעט
— Come and hear: [According to the lot shall their inheritance be divided] whether many<span class="x" onmousemove="('comment',' I.e., whether the tribe consists of many individuals. ');"><sup>1</sup></span> or few.<span class="x" onmousemove="('comment',' Num. XXVI, 56. Few, is taken to refer to a small tribe. Since scripture directs the distribution of equal shares to all tribes, the land must have been divided 'according to the number of tribes', and not 'according to the number of individuals'. It will be noted that the rendering of [H] adopted in the Gemara, slightly differs from that in E.V. ');"><sup>2</sup></span> Furthermore it was taught: The land of Israel will in time to come be divided between thirteen tribes; for at first<span class="x" onmousemove="('comment',' When the promised land was entered. ');"><sup>3</sup></span>