I'm in the middle of a discussion about being 'Born Again' and the result of that is confirming that you are going to heaven. It's a settled matter unless you reject God at some point in your life.

I can find the 'Born Again' referenced in the Bible, but where does it say that you will absolutely go to heaven after that unless you reject Him?

Born again means you must be born of your mother womb. in the first earth age your soul was as a angel now you have a choice to follow christ or satan that depends on you if you go to heaven to whether or not you accept christ or worship satan the third earth age start when christ sets one foot on mount olive and one foot on mount zion then we will all change to our celestial bodies and starts the milliuem the 1000 year rein with christ that will be the third earth age

If you will read my question again, the question was "where in the Bible does it back up the belief that if you are Born Again, you will be assured of going to heaven."

Here is one answer copied from www.biblegateway.com

Romans 11:25-32

Good News Translation (GNT)

God's Mercy on All
25 There is a secret truth, my friends, which I want you to know, for it will keep you from thinking how wise you are. It is that the stubbornness of the people of Israel is not permanent, but will last only until the complete number of Gentiles comes to God.26 And this is how all Israel will be saved. As the scripture says,


The Savior will come from Zion
and remove all wickedness from the descendants of Jacob.
27 I will make this covenant with them
when I take away their sins.


28 Because they reject the Good News, the Jews are God's enemies for the sake of you Gentiles. But because of God's choice, they are his friends because of their ancestors.29 For God does not change his mind about whom he chooses and blesses.30 As for you Gentiles, you disobeyed God in the past; but now you have received God's mercy because the Jews were disobedient.31 In the same way, because of the mercy that you have received, the Jews now disobey God, in order that they also may now[a] receive God's mercy.32 For God has made all people prisoners of disobedience, so that he might show mercy to them all.
Footnotes:

Romans 11:31 Some manuscripts do not have now.
(Once you have accepted Christ, You will live in God's Kingdom unless you fall away and disobey God without repenting. God never goes back on His word.
Read and study all of the New Testament and Old and you will find the answers for yourself. joemh)