The author shows, that the data containing in two new recently revealed historical sources dated from the 13th century, i.e. "al-Havadis-l-jamaa' ("Society events") Kamal ad-dyne Abd ar-Razzak binni Ahmed Shajbani more known as Ibni Fuvati, and the treatise of the astronomer of the 13th century Mas'ud Ali-shah Dargani Buhari under the name "Ashjar wa asmar" ("Origins and posterities") are valuable source, for the study of revolt of Mahmud Tarabi in Bukhara (1238).