Life after death

Proof of Life after death 

There are nearly two hundred verses in the Holy Quran in which reference to the Hereafter is made. According to Islam, human existence in this world is a prelude to life after death. Life in this world is transitory. It is  an examination period during which we prepare ourselves, either for reward or punishment for the next life which is permanent and ever lasting.
 Man was given the faculty of choosing between good and evil. Allah created life and death in order to test man as to who is best in conduct. A firm belief in future life means a strong belief in the process of accountability. Man does not perish altogether after death. His spirit will survive until the Day of Judgement when Allah will reunite the souls with the bodies and raise the dead to life again. 
some proofs were also given by Allah of life after death .One of them is given here.
There was a man from among the Children of Israel who was impotent. He had substantial wealth, and only a nephew who would inherit from him. So his nephew killed him and moved his body at night, placing it at the doorstep of a certain man. The next morning, the nephew cried out for revenge, and the people took up their weapons and almost fought each other.The wise men among them said, `Why would you kill each other, while the Hazrat Musa (A.S). is still among you' So they went to Hazrat Musa (A.S). They and mentioned the matter to him and  Hazrat Musa (A.S said,"Verily, Allah commands you that you slaughter a cow.'' They said, "Do you make fun of us'' He said, "I take Allah's refuge from being among the ignorant or the foolish.'' "Had they not disputed, it would have been sufficient for them to slaughter any cow
However, they disputed, and the matter was made more difficult for them, until they ended up looking for the specific cow that they were later ordered to slaughter. They asked many unnecessary questions from Hazrat Musa (A.S). They asked , "What is this cow and what is its description'' Hazrat Musa (A.S) said '' it is a cow neither too old nor too young.Cow was so yellow that it appeared blackish or reddish in color,it is not used in farming, or for watering purposes.
 Rather, it is  norable and fair looking. They found the designated cow with a man, only who owned that cow. He said, `By Allah! I will only sell it for its skin's fill of gold.' So they paid the cow's fill of its skin in gold, slaughtered it and touched the dead man with a part of it. 
He stood up, and they asked him, `Who killed you' He said, `That man,' and pointed to his nephew. He died again, and his nephew was not allowed to inherit him. Thereafter, whoever committed murder for the purpose of gaining inheritance was not allowed to inherit.'

Tafseer Ibn e kathir

Al-baqra : 68 to 74