Hume, David: An Enquiry Concerning Human Understanding: https://archive.org/details/enquiryconcernin01hume (1748)
https://ia800204.us.archive.org/18/items/enquiryconcernin01hume/enquiryconcernin01hume.pdf
Free audio book https://archive.org/details/human_understanding_0711_lv_2
https://www.marxists.org/history/france/grimm/hume-rousseau.htm
About David Hume and his possible knowledge of Buddhism:
https://muse.jhu.edu/article/403830