Adam Clarke on 1 Chronicles 4:27

Neither did all their family multiply - In Num 1:23 the number of all the families of Simeon was fifty-nine thousand three hundred; and that of Judah was, Num 1:27, not less than seventy-four thousand six hundred. When the next census was made, Num. 26, the tribe of Judah amounted to seventy-six thousand five hundred, an increase of one thousand nine hundred; while the tribe of Simeon amounted only to twenty-two thousand two hundred, a decrease of thirty-seven thousand one hundred. It was at that time the smallest tribe in Israel.