Whilst their children remember - Even the rising generation have their imagination stocked with idol images, and their memories with the frantic rites and ceremonies which they saw their parents observe in this abominable worship.
While their children remember their altars - Perhaps an allusion to their sacrifices of children to Moloch. Present perhaps at some such blood-stained rite, its horrors would be engraven forever upon the memory.
Groves - “Asherahs,” i. e., wooden images of Astarte (see Exodus 34:13 note).