Outward Holiness, or External Holiness, is a conservative dress and conduct requirement in some Christian churches. The requirement was prevalent during the revival movements for early Lutheran Pietism and Methodism, and during the Holiness Movement and Pentecostal Movement. Some Apostolic and traditional Holiness-Pentecostal denominations continue to observe outward holiness. It is taken from 1 Peter 1:15: "He which hath called you is Holy, so be ye holy in all manner of conversation."