Hadith no.4

Abu Abdur-Rahman Abdullah bin Mas`ood (may Allah be pleased with him) narrated, "The Messenger of Allah (peace be upon him), the true and truly inspired, said, `(The matter of the creation of) a human being is put together in the womb of his mother in forty days, and then he becomes a clot of thick blood for a similar period, and then a piece of flesh for a similar period. Then Allah sends an angel to breathe his soul into him and then He orders him (the angel) to write four decrees. He is ordered to write down his (i.e. the new being`s) livelihood, his (date of) death, his deeds, and whether he will be blessed or wretched (in religion). By Allah with Whom there is no other god! Anyone amongst you may do the (good) deeds of the people of Paradise until there is only a cubit between him and Paradise and what has been written for him decides his behaviour and he starts doing the (evil) deeds of the people of the Fire until he enters it. Verily, anyone amongst you may do the (evil) deeds of the people of the Fire until there is only a cubit between him and the Fire and what has been written for him decides his behaviour and he starts doing the deeds of the people of Paradise until he enters it.` (Recorded by Al-Bukharee and Muslim)