Those that were numbered of them, {h} according to the number of all the males, from a month old and upward, even those that were numbered of them were seven thousand and five hundred.

(h) Only numbering the male children.Numbers 3:22 Parallel Commentaries

The Fifth Commandment
Honour thy father and thy mother: that thy days may be long upon the land which the Lord thy God giveth thee.' Exod 20: 12. Having done with the first table, I am next to speak of the duties of the second table. The commandments may be likened to Jacob's ladder: the first table respects God, and is the top of the ladder that reaches to heaven; the second respects superiors and inferiors, and is the foot of the ladder that rests on the earth. By the first table, we walk religiously towards God; by …
Thomas Watson—The Ten Commandments

Appendix ii. Philo of Alexandria and Rabbinic Theology.
(Ad. vol. i. p. 42, note 4.) In comparing the allegorical Canons of Philo with those of Jewish traditionalism, we think first of all of the seven exegetical canons which are ascribed to Hillel. These bear chiefly the character of logical deductions, and as such were largely applied in the Halakhah. These seven canons were next expanded by R. Ishmael (in the first century) into thirteen, by the analysis of one of them (the 5th) into six, and the addition of this sound exegetical rule, that where two …
Alfred Edersheim—The Life and Times of Jesus the Messiah