John Gill Commentary Numbers 2:11

"And his host, and those that were numbered thereof, were forty and six thousand and five hundred." — Numbers 2:11 (ASV)

And his host
That is, the host of Reuben, as distinct from his camp, of which it was only a part, and of which Elizur was captain;

and those that were numbered thereof, [were] forty and six thousand
and five hundred .
] 46,500 men; see (Numbers 1:21) .