The Pfarrernotbund (English: Emergency Covenant of Pastors) was an organisation founded on 11 September 1933 to unite German evangelical theologians, pastors and church office-holders against the introduction of the Aryan paragraph into the 28 Protestant regional church bodies and the Deutsche Evangelische Kirche (DEK) and against the efforts by Reich-bishop Ludwig Müller and the German Christians (DC) since April 1933 to merge the German evangelical churches into one "Reich's church", that would be Nazi in ideology and entirely lacking any Jewish or Christian origins. As a Christian resistance to National Socialism it was the forerunner of the Confessing Church, founded the following year.
Read more about Pfarrernotbund: Prelude, Gathering The Opposition in The Emergency Covenant of Pastors, Source