those who are working up passion among big trees, under every luxuriant tree, slaughtering the children in the torrent valleys under the clefts of the crags?”​—Isaiah 57:4, 5.

Out among the big trees in the countryside, they stir up religious fervor in their idolatrous worship. And what cruel worship! Why, they even slaughter their own children, like the nations whose detestable ways led to their being driven off the land by Jehovah!​—1 Kings 14:23; 2 Kings 16:3, 4; Isaiah 1:29.