21 This is what the LORD says: Be careful not to carry a load on the Sabbath day or bring it through the gates of Jerusalem.

Read Jeremiah 17:21 Using Other Translations

Thus saith the LORD; Take heed to yourselves, and bear no burden on the sabbath day, nor bring it in by the gates of Jerusalem;
Thus says the LORD: Take care for the sake of your lives, and do not bear a burden on the Sabbath day or bring it in by the gates of Jerusalem.
This is what the LORD says: Listen to my warning! Stop carrying on your trade at Jerusalem’s gates on the Sabbath day.