Numbers 3:39

and Aaron. These two words are dotted in the Hebrew. See App-31. The command was given to Moses alone (verses: Numbers 3:14; Numbers 3:15), and was carried out by him alone (Numbers 3:16). As Aaron took part, according to Numbers 1:3; Numbers 1:4, and Numbers 4:41; Numbers 4:45; Numbers 4:46, his name was included here by some ancient copyist; and later scribes dotted the words rather than leave them out.

commandment. Hebrew "mouth", put for what was spoken by it by Figure of speech Metonymy (of Cause), App-6.