1968, Ödön Schütz, editor, An Armeno-Kipchak chronicle on the Polish-Turkish wars in 1620-1621, Bibliotheca Orientalis Hungarica, 11, Budapest: Akadémiai Kiadó, →OCLC, page 41:
On Friday, 1 January 1620 there came chawushes from the Sultan of Turkey and went from Kamenets to Warsaw.