O Holy Lord Jesus Christ, help us to remain steadfast in the holy teachings of Thy church and disallow false ways of believing, thinking and living to corrupt and scatter Thy flock! Grant that we may preserve unsullied the pearl of great price given unto us, keeping it inviolate for all generations to come, through the prayers of Thy most pure Mother and of all the saints. Amen.

http://www.orthodox.net/articles/against-ecumenism.html