The 200th mitzvah is that we are commanded to pay a hired worker on the day that he works, and not to delay it to another day.

The source of this commandment is G‑d's statement1 (exalted be He), "You must give him his wage on the day it is due."

This mitzvah dictates that a day worker can collect his wages the following night and that a night worker can collect his wages the following day, as explained in the prohibitions.2

The details of this mitzvah are completely explained in the 9th chapter of tractate Bava Metzia.3 There it is explained that this obligation applies to all hired workers, whether Jewish or non-Jewish,4 and that it is a positive commandment to pay on time.