2 Corinthians 13:1 (NKJV Strong’s Bible)? This will be the third time I am coming to you. “By the mouth of two or three witnesses every word shall be established.”
If you want to establish some concept or truth based on the Word of God(the Holy Bible), you’ve got to prove it. How do you prove the Word Od God? You do so by the Word of God.
If you can find a concept in multiple location in the Word Of God, you’re treading into a danger zone. Have you got a truth in multiple locations of he Bible, you’re looking good!