The story of Umm Qirfa, an elderly woman from the Banu Fazara tribe, is described in some early Islamic sources as having been executed in an exceptionally brutal manner, by being tied between two camels that were driven apart, causing her death. The account is frequently cited in discussions of early Islamic history.
First read it from Ibn Ishaq's Sirat Rasul Allah - The Life of Muhammad Translated by A. Guillaume : Ibn Ishaq, Translated by A. Guillaume page 664,665.
In The History of al-Tabari, vol. 8 : page 95 to97 this is also written.
See how violently muslims kill Umm Qirfa in Ibn Sa’d, Al-tabaqat Al-kabir | الطبقات الكبير لإبن سعد
