Every child is born on Islam, but his parents make him a Jew and a Christian, just as a beast is born whole. Do you find some among them (born) maimed? The people asked : Messenger of Allah! What do you think about the one who died while he was young? He replied : Allah knows best what he was going to do.
Sunan Abi Dawud Book 42, Hadith 119
← Previous Hadith The Prophet (May peace be upon him) was invited to the funeral of a boy who belonged to the ANSAR and I said; Messenger of Allah! This one is blessed, for he has done no evil, nor has he known it. He replied : It may be otherwise, ‘A’ishah, for Allah created Paradise and created those who will go to it, and He created it for them when they were still in their father’s loins; and he created hell and created those who will go to it, and created it for them when they were still in their father’s loins.

Sunan Abi Dawud Book 42, Hadith 118 Next Hadith → Malik was asked : The heretics argue from this tradition against us. Malik said : Argue against them from its last part which goes. The people asked : What do you think about the one who died while he was young? He replied : Allah knows best what he was going to do.

Sunan Abi Dawud Book 42, Hadith 120