Deuteronomy 6:14

The worship of Jehovah not only precludes all idolatry, which the Lord, as a jealous God, will not endure (see at Exo 20:5), but will punish with destruction from the earth ("the face of the ground," as in Exo 32:12); but it also excludes tempting the Lord by an unbelieving murmuring against God, if He does not remove any kind of distress immediately, as the people had already sinned at Massah, i.e., at Rephidim (Exo 17:1-7).

Moses, in this chapter, goes on with his charge to Israel, to be sure to keep up their religion in Canaan. It is much the same with ch. 4. I. His preface is a persuasive to obedience (Deu 4:1-3). II. He lays down the great principles of obedience. The first truth to be believed, That God is one (Deu 4:4). The first duty to be done, To love him with all our heart (Deu 4:5). III. He prescribes the means for keeping up religion (Deu 4:6-9). IV. He cautions them against those things which would be the ruin of religion - abuse of plenty (Deu 4:10-12), inclination to idolatry (Deu 4:14, Deu 4:15), and gives them some general precepts (Deu 4:13, Deu 4:16-18). V. He directs them what instructions to give their children (Deu 4:20, etc.).