You might be thinking of the Christadelphians ("brothers of Christ"). The Christian denomination was founded in England in the early 19th Century. Its founder John Thomas believed that scripture, as God's word, did not support a multiplicity of differing beliefs, so Christadelphians are dedicated to the process of restoring first-century Christian beliefs and correct interpretation of the Bible through a process of ongoing debate. See link below for in-depth information on this sect.
Christadelphian is a religious group that emerged in the 19th century, focusing on the beliefs that The Bible is the inspired word of God and that following its teachings is essential for salvation. They reject the doctrine of the Trinity and believe in the literal return of Jesus Christ to establish God's kingdom on Earth. Christadelphians emphasize personal Bible study and baptism by immersion.