The Vimuttimagga, Path of Freedom, is a manual of spiritual practice for monks and nuns composed in either South India or Sri Lanka by Upatissa Thera. It may date from between the 1st and 4th centuries CE.
It seems Buddhaghosa had this work available to him when he wrote his Visuddhimagga and may even have used it as his model. The two works are similar in content and structure except that the Vimuttimagga is more practical, particularly on the subject of meditation, and shows no influence of abhidhamma. The Vimuttimagga disappeared in India and Sri Lanka but was preserved in a Chinese translation.