holy father ;

holy (hl)
adj. ho·li·er, ho·li·est
1. Belonging to, derived from, or associated with a divine power; sacred.
http://www.thefreedictionary.com/holy
father
6. Father Christianity
a. God.
b. The first person of the Christian Trinity.
10. or Father A church father
http://www.thefreedictionary.com/Father