Numbers 2:10-12

Young's Literal Translation

¹⁰ The standard of the camp of Reuben [is] southward, by their hosts; and the prince of the sons of Reuben [is] Elizur son of Shedeur;

¹¹ and his host, and its numbered ones, [are] six and forty thousand and five hundred.

¹² And those encamping by him [are of] the tribe of Simeon; and the prince of the sons of Simeon [is] Shelumiel son of Zurishaddai;