'God of Your Fathers' in the Bible

Behold, God is with us at our head, and his priests with the trumpets of alarm to sound an alarm against you. children of Israel, do not fight against the LORD, the 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 to meet the army that came to Samaria, and said to them, "Behold, because the LORD, the God of your fathers, was angry with Judah, he has delivered them into your hand, and you have slain them in a rage which has reached up to heaven.

and said to them, "Listen to me, you Levites. Now sanctify yourselves, and sanctify the house of the LORD, the God of your fathers, and carry out the filthiness out of the holy place.