These two verses are considered by some very similar in style to the last 27 chapters of Isaiah. The contrast, however, between the full end made with the pagan, and the certainty that Israel shall never so perish, is one of Jeremiah’s most common topics.
In measure - See the Jeremiah 10:24 note.
10 Therefore fear thou not, O my servant Jacob, saith the LORD; neither be dismayed, O Israel: for, lo, I will save thee from afar, and thy seed from the land of their captivity; and Jacob shall return, and shall be in rest, and be quiet, and none shall make him afraid.
11 For I am with thee, saith the LORD, to save thee: though I make a full end of all nations whither I have scattered thee, yet will I not make a full end of thee: but I will correct thee in measure, and will not leave thee altogether unpunished.