II. Their disobedient undutiful conduct towards God, for which he might justly have thrown them out of covenant as soon as he had taken them into covenant (v. 13): They rebelled in the wilderness. There where they received so much mercy from God, and had such a dependence upon him, and were in their way to Canaan, yet there they broke out in many open rebellions against the God that led them and fed them. They did not only not walk in God's statutes, but they despised his judgments as not worth observing; instead of sanctifying the sabbaths, they polluted them, greatly polluted them; one gathered sticks, many went out to gather manna on this day. Hereupon God was ready sometimes to cut them off; he said, more than once, that he would consume them in the wilderness. But Moses interceded, so did God's own mercy more powerfully, and most of all a concern for his own glory, that his name might not be polluted and profaned among the heathen (v. 14), that the Egyptians might not say that for mischief he brought them thus far, or that he was not able to bring them any further, or that he had no such good land as was talked of to bring them to, Exod. xxxii. 12; Num. xiv. 13, &c. Note, God's strongest reasons for his sparing mercy are those which are fetched from his own glory.