In his travel memoirs about Khorasan, the 14th century Moroccan traveller Muhammad Ibn Battuta mentioned crossing into India via the mountain passes of the Hindu Kush. In his Rihla, he states that the name of the mountain range translates to Hindu-slayer due to slaves from India dying there. Alexander von Humboldt stated that it can be learned from his work that the name only referred to a single mountain pass upon which many Indian slaves died of the cold weather. Battuta wrote,