From Li Bai's (
李白) Tang-dynasty quatrain
《早发白帝城》 (Departing Early from Baidicheng). Full quatrain:
朝辞白帝彩云间,千里江陵一日还。两岸猿声啼不住,轻舟已过万重山 - 'at dawn I took leave of Baidi amid colored clouds; a thousand li to Jiangling, back in a day. The gibbons on both banks cry without pause; my light boat has already passed ten thousand peaks.' Li wrote it around 759 on hearing his exile had been lifted.