Thank you for the reference question, “Where in the Bible can you find “God of Israel?”
In most Bible, there is a reference section of major topical words of the Bible. This is a very helpful tool for a quick study like the question that one is asking. I looked under the term, God, and that in Joshua 14:14, there is the first citation. It was a quick look under the term, God.
Joshua 14:13-14 says this, “Then Joshua blessed Caleb son of Jephunneh and gave him Hebron as his inheritance. 14 So Hebron has belonged to Caleb son of Jephunneh the Kenizzite ever since, because he followed the Lord, the God of Israel, wholeheartedly” (A searchable online Bible in over 150 versions and 50 languages). Bible citations are in the New International Version.
Joshua 24:23, “Now then,” said Joshua, “throw away the foreign gods that are among you and yield your hearts to the Lord, the God of Israel: (NIV).
There are other citations in the Old Testament. Do look in the concordance at the back of the Bible.
SUMMARY: Use the concordance on key words and you will have a wonderful study on individuals words of the Bible.
For more perspectives:
https://www.quora.com/Where-in-the-Bible-can-you-find-God-of-Israel