While there no direct mention of an "age of accountability", there is scripture that backs up the belief that those who never heard (or cannot mentally comprehend) the Gospel can be allowed into Heaven:
Romans 2: 13-15
13(For not the hearers of the law are just before God, but the doers of the law shall be justified.
14For when the Gentiles, which have not the law, do by nature the things contained in the law, these, having not the law, are a law unto themselves:
15Which shew the work of the law written in their hearts, their conscience also bearing witness, and their thoughts the mean while accusing or else excusing one another;)
Lord, thank you for BibleGateway.com's Bible word search.
Thank you for agreeing there is no scripture directly supporting the idea of an 'age of accountability'.
You have attempted to proof quote scripture to support your private view that there is such a thing, but there is not and I will demonstrate, using your quotes that there is not.
Your quote is:
Romans 2: 13-15
13(For not the hearers of the law are just before God, but the doers of the law shall be justified.
This says absolutely nothing about an age of accountability. It seems to be the Paul/James controversy between works and faith.
14For when the Gentiles, which have not the law, do by nature the things contained in the law, these, having not the law, are a law unto themselves:
Again, this has nothing at all to do with an age of accountability. This deals with the fact that god's laws are intuitive and everyone regardless of faith or creed simply 'gets' that murder and other bad things are wrong.
15Which shew the work of the law written in their hearts, their conscience also bearing witness, and their thoughts the mean while accusing or else excusing one another;)
See what I wrote for verse 14. Again, this 'proof text' utterly fails to present any evidence whatsoever that there is any such thing as an age of accountability in the bible.
What is in the bible is this:
Everyone is born unto sin. There is nothing that any human can do that is good in God's eyes because it is all tainted. Everyone is deserving of eternal damnation. Those who escape damnation do so not because of merit, but grace and mercy.
The very idea of an 'age of accountability' is completely foreign to scripture and it is pure nonsense that those who cannot stomach God as he is invent false doctrines to assuage their conscience. Make no mistake it is a 100% invented doctrine and has absolutely zero scripture supporting it. Take God as he is. Love him or hate him, but stop trying to make him out to be more politically correct than he is.