All that were numbered of the Levites, which Moses and Aaron numbered at the commandment of the LORD, throughout their families, all the males from a month old and upward, were twenty and two {o} thousand.

(o) So that the first born of the children of Israel were more by 273, as in Nu 3:43.

Wesley's Notes

3:39 Two and twenty thousand - If the particular numbers mentioned Num 3:22,28,34, be put together, they make 22,300. But the odd 300 are omitted here, either according to the use of the holy scripture, where in so great numbers small sums are commonly neglected, or, because they were the first - born of the Levites, and therefore belonged to God already, and so could not be given to him again instead of the other first - born. If this number of first - born seem small to come from 22,000 Levites, it must be considered, that only such first - born are here named as were males, and such as continued in their parents families, not such as had erected new families of their own. Add to this, that God so ordered things by his wise providence for divers weighty reasons, that this tribe should be much the least of all the tribes, as is evident by comparing the numbers of the other tribes, from twenty years old, Num 1:3 - 49, with the number of this from a month old; and therefore it is not strange if the number of their first - born be less than in other tribes.

Jamieson-Fausset-Brown Bible Commentary

39. twenty and two thousand-The result of this census, though made on conditions most advantageous to Levi, proved it to be by far the smallest in Israel. The separate numbers stated in Nu 3:22, 28, 34, when added together, amount to twenty-two thousand three hundred. The omission of the three hundred is variously accounted for-by some, because they might be first-born who were already devoted to God and could not be counted as substitutes; and by others, because in Scripture style, the sum is reckoned in round numbers. The most probable conjecture is, that as Hebrew letters are employed for figures, one letter was, in the course of transcription, taken for another of like form but smaller value.

Matthew Henry's Concise Commentary

3:14-39 The Levites were in three classes, according to the sons of Levi; Gershon, Kohath, and Merari; and these were subdivided into families. The posterity of Moses were not at all honoured or privileged, but stood upon the level with other Levites; thus it was plain, that Moses did not seek the advancement of his own family, or to secure any honours to it. The tribe of Levi was by much the least of all the tribes. God's chosen are but a little flock in comparison with the world.