Numbers 12:3 - Ellicott's Commentary On The Whole Bible

Now the man Moses was very meek... — These words have been urged by some as an argument against the Mosaic authorship of the Pentateuch generally, or of the Book of Numbers in particular, but whether they may or may not have been inserted by a later writer, this inference is altogether unfounded. It is possible that the writer of Deuteronomy 34:10 may have inserted these words in this place. On the other hand, there is no necessity for such a supposition. An objective statement, such as that contained in these words, is perfectly consistent with true humility and with a deep sense of sinfulness and frailty. When such expressions are required in order to a full understanding of all the circumstances of the history, they afford no just ground of objection either against the writer, or against the genuineness of the writing; and least of all can they be justly objected to in the case of those who, like Moses and St. Paul, were ever ready to sacrifice their own personality in the cause to which they had devoted their lives (comp. 2 Corinthians 11:5). It may be observed, further, that the word anav, meek, is frequently interchanged with the cognate word ani, and that the meaning may be bowed down, or oppressed.