Oct. 26, 1939

Regulation on the introduction of forced labor for the Jewish population of the Occupied Polish Territories issued by the Governor-General [Germany / Occupied Poland]: “Article 1- A forced labor will be implemented to the Jews living in the occupied district with immediate effect. The Jews will be grouped for this purpose into forced labor squads. […] Warsaw 26 October 1939 – The Governor-General for the Occupied Polish territories Frank.”
Yad Vashem Archives, the Weichert Collection, file no. 1,  page 20, Accessed online; Translated by Franziska Wagener 1/22/2016