Christoph Witzenrath (2016). Eurasian Slavery, Ransom and Abolition in World History, 1200–1860. Routledge. p. 45. ISBN978-1-317-14002-3. «Ibn Battuta, the renowned Moroccan fourteenth century world traveller remarked in a spine-chilling passage that Hindu Kush means slayer of the Indians, because the slave boys and girls who are brought from India die there in large numbers as a result of the extreme cold and the quantity of snow.»