Nehemiah 13:18-22

Did your fathers not do the same, so that our God brought on us and on this city all this trouble? Yet you are adding to the wrath against Israel by profaning the Sabbath.”

And it came about that just as it became dark at the gates of Jerusalem before the Sabbath, I ordered that the doors be shut, and that they were not to open them until after the Sabbath. Then I stationed some of my servants at the gates so that no load would enter on the Sabbath day.

Once or twice the traders and merchants of every kind of merchandise spent the night outside Jerusalem.

Then I warned them and said to them, “Why do you spend the night in front of the wall? If you do so again, I will use force against you.” From that time on they did not come on the Sabbath.

And I ordered the Levites that they were to purify themselves and come as gatekeepers to sanctify the Sabbath day. For this also remember me, my God, and have compassion on me according to the greatness of Your mercy. Mixed Marriages Forbidden