Jeremiah 16:18

(18) I will recompense their iniquity and their sin double.—A restitution, or fine, to double the amount of the wrong done was almost the normal standard of punishment under the Law of Moses (Exodus 22:4; Exodus 22:7). The words threaten accordingly a full punishment according to the utmost rigour. In Isaiah 40:2 the same thought is presented in its brighter aspect. Israel has received “double for all her sins,” and therefore, having paid, as it were, “the uttermost farthing” (Matthew 5:26), she may now hope for mercy.

The carcases . . .—The word may be used in scorn of the lifeless form of the dumb idols which the people worshipped, to touch which was to be polluted, as by contact with a corpse (Numbers 19:11); but it more probably points to the dead bodies of the victims that had been sacrificed to them. The phrase occurs also in a like context in Leviticus 26:30. It would appear from Isaiah 65:4 that these often included animals which by the Law were unclean: “swine’s flesh and broth of abominable things.”