Apostoliese Geloof Sending van SA (AGS) . The Apostolic Faith Mission of South Africa (AFM) is part of the worldwide Pentecostal movement born at the beginning of the 20th century. In South Africa, the AFM is the oldest and by far the largest Pentecostal church. We operate under the name of HEILIGE WATERS and welcome all who wish to praise and worship Jesus Christ our Lord and Saviour