R. Yehudah says: Amalek skipped five nations and he came and warred with Israel, viz. (Numbers 13:29) "Amalek dwells in the southland; the Chitti, (the Chivi) the Yevussi and the Emori dwell in the mountain, and the Canaani dwells by the sea," (Amalek) being the innermost. R. Nathan says: (Amalek) came from the mountains of Seir. Amalek skipped four hundred parasangs and came to war against Israel.