“to idols.” In this instance we replaced the pronoun “them” with “idols” so the reader would better understand the verse.
“to be devoured.” Children were sometimes sacrificed to pagan gods, and God speaks of that here as if the gods were eating the children as food. The sacrifices that were regularly burned to both God and pagan gods was food and would have otherwise been eaten by the priests and the people, and meat, grain, and oil were burned to God and the gods. In many cases, people presented food they had baked as a gift offering to the gods. So the image in this verse is very cultural, but horrific: people are offering their children as food to the gods, and murdering their children in the name of religion. That anyone, pagan or not, could do that is beyond understanding, but that the people of Israel could stray so far from God, His commandments, and family love boggles the mind. Because child sacrifice was common among the pagans, God specifically forbid it for Israel (Lev. 18:21; 20:2; Deut. 12:31; 18:10).