Sahih Muslim Book 40, Hadith Number 6827.
Abu Sa’id reported Allah’s Messenger (may peace be upon him) as saying: Death would be brought on the Day of Resurrection in the form of a white-coloured ram. Abu Kuraib made this addition: Then it would be made to stand between the Paradise and the Hell. So far as the rest of the hadith is concerned there is perfect agreement (between the two narrators) and it would be said to the inmates of Paradise: Do you recognise this? They would raise up their necks and look towards it and say: Yes, it is death. Then it would be said to the inmates of Hell-Fire. Do you recognise this? And they would raise up their necks and look and say: Yes, it is death. Then command would be given for slaughtering that and then it would be said: O inmates of Paradise, there is an everlasting life for you and no death. And then (addressing) to the inmates of the Hell-Fire, it would be said: O inmates of Hell-Fire, there is an everlasting living for you and no death. Allah’s Messenger (may peace be upon him) then recited this verse pointing with his hand to this (material) world: “Warn them, this Day of dismay, and when their affairs would be decided and they would be un-mindful and they believe not” (xix. 39).