David may make a statement, but no where in scripture do we find such assurance. I am not saying that God does not make exceptions in the distribution of His grace, but we can't assume that.
My very first funeral was of an infant of believing parents. I wrestled with this concept day and night,,,and many years later. Sorry, I could not reach the idea that someone is automatically saved under the spurious "age of consent".
Cheers,
Jim
Another thing is when did Adam and Eve become aware of their nakedness and sin? When she began the conversation with the serpent and looked at the fruit was she guilty of sin at that point? When she lusted after that fruit she was in sin, looking at it didn't make it sin lusting after it did, and that is what she did but when did they become guilty and know theu had sinned?
16 And the Lord God commanded the man, saying, Of every tree of the garden thou mayest freely eat:
17 But of the tree of the knowledge of good and evil, thou shalt not eat of it: for in the day that thou eatest thereof thou shalt surely die.
They became guilty when they gained the knowledge of good and evil. Until that point any sin they had commited was not laid to their charge.
The penalty for sin is death, yet God said death would come when they ate from the tree of the knowledge of good and evil, this gaining the knowledge of sin brought death. The child that has not realized themselves a sinner with the knowledge of good and evil is covered just as Adam and Eve were covered until they gained that knowledge.
Geneisi 3:6 And when the woman saw that the tree was good for food, and that it was pleasant to the eyes, and a tree to be desired to make one wise, she took of the fruit thereof, and did eat, and gave also unto her husband with her; and he did eat.
7 And the eyes of them both were opened, and
they knew that they were naked; and they sewed fig leaves together, and made themselves aprons.
Notice then how the blame game started this still exit today,
9 And the Lord God called unto Adam, and said unto him, Where art thou?
10 And he said, I heard thy voice in the garden, and I was afraid, because I was naked; and I hid myself.
11 And he said, Who told thee that thou wast naked? Hast thou eaten of the tree, whereof I commanded thee that thou shouldest not eat?
12 And the man said, The woman whom thou gavest to be with me, she gave me of the tree, and I did eat.
13 And the Lord God said unto the woman, What is this that thou hast done? And the woman said, The serpent beguiled me, and I did eat.
The penalty was attached to the eating but the eating brought knowledge of sin, good and evil. Until a child comes to that point they are in innocence although dead spiritually (seperated from spiritual knowledge).