The desecration of the Sabbath is first brought into prominence among the sins of the Jewish people by Jeremiah Jeremiah 17:21-27. It could not but have gained ground during the captivity, when foreign masters would not have allowed the cessation of labor for one day in seven. On the return from the captivity, the sabbatical rest appears to have been one of the institutions most difficult to re-establish.
In the day - Some render, “concerning the day.”