Charles Ellicott Commentary Numbers 11:21

"And Moses said, The people, among whom I am, are six hundred thousand footmen; and thou hast said, I will give them flesh, that they may eat a whole month." — Numbers 11:21 (ASV)

Six hundred thousand footmen.— In Numbers 1:46 the number is stated to be 603,550; but here, as elsewhere, a round number is mentioned.