The places where pagan rites were performed had become so dear to the people that the prophecy compares the people's attitude toward them with their attitude toward their own sons. But sons are those who are to inherit everything their parents have; meanwhile, what the parents possess has been received from the Lord. It turns out that they intend to hand His gifts over to false gods, hateful to Him. Such actions are already more than turning away from the Lord: they are the defilement of the gifts of His love.
Hearing the warning that those who turn away from God will be written on the dust, we remember His words spoken to the first human being after he first turned away from Him: dust you are, and to dust you shall return. Dust will be scattered by the wind, and no trace of it will be found; all that apostates hope in will turn to dust. We also remember how Jesus wrote on the ground - on that same dust - in the moments when the accusers brought a sinful woman to Him. These episodes of the Old and New Testaments are interconnected, and what was written on the dust reminded sinners of their own wrongs.
But again the prophet reminds us that sinners are given the possibility of correcting their ways. Through the prophet, the Lord calls them to remember the Sabbath day, and in this context that means something more than simply observing an established tradition: it means dedicating oneself completely and one's whole life to the Lord, just as the seventh day is dedicated to Him.
