'God of Your Fathers' in the Bible

And, behold, God himself is with us as our captain, and his priests with sounding trumpets to sound the alarm against you. O children of Israel, fight not against the LORD God of your fathers; for you shall not prosper.

But a prophet of the LORD was there, whose name was Oded: and he went out before the army that came to Samaria, and said unto them, Behold, because the LORD God of your fathers was angry with Judah, he has delivered them into your hand, and you have slain them in a rage that reaches up unto heaven.

And said unto them, Hear me, you Levites, sanctify now yourselves, and sanctify the house of the LORD God of your fathers, and carry forth the filth out of the holy place.