Kirakos Gandzaketsi. History of the Armenians, "Chapter 30: Concerning the destruction which occurred in the Xach'en area, and about the pious prince Jalal" (Պատմություն Հայոց). Edited by K. Melik-Ohandjanyan. Yerevan, Armenian SSR, 1961 [g266-269]. Trans. in English by Robert Bedrosian.
"After this, [the Mongols] convened a great assembly of the old and new cavalry of the Georgians and Armenians and went against the city of Baghdad with a countless multitude." History of the Nation of Archers, Chap 12. Grigor of Akner, circa 1300
