What does Nehemiah 13:12 mean?

Then I commanded, and they cleansed the rooms. I brought into them the vessels of God’s house, with the meal offerings and the frankincense again.

I perceived that the portions of the Levites had not been given them; so that the Levites and the singers, who did the work, had each fled to his field.

Then I contended with the rulers, and said, “Why is God’s house forsaken?” I gathered them together, and set them in their place.

I made treasurers over the treasuries, Shelemiah the priest, and Zadok the scribe, and of the Levites, Pedaiah: and next to them was Hanan the son of Zaccur, the son of Mattaniah; for they were counted faithful, and their business was to distribute to their brothers.

Remember me, my God, concerning this, and don’t wipe out my good deeds that I have done for the house of my God, and for its observances.

In those days saw I in Judah some men treading wine presses on the Sabbath, bringing in sheaves, and loading donkeys; also with wine, grapes, figs, and all kinds of burdens, which they brought into Jerusalem on the Sabbath day; and I testified against them in the day in which they sold food.