2. Command the children of Israel, and say unto them--The repetition of several laws formerly enacted, which is made in this chapter, was seasonable and necessary, not only on account of their importance and the frequent neglect of them, but because a new generation had sprung up since their first institution and because the Israelites were about to be settled in the land where those ordinances were to be observed.
      My offering, and my bread--used generally for the appointed offerings, and the import of the prescription is to enforce regularity and care in their observance.

JFB.