Musnad Ahmad

Narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Holy Prophet (peace and blessings of Allah be upon him) said: On the Day of Resurrection, death will be brought in the form of a ram and will be made to stand on the Bridge of Sirat. The people of Paradise will be called and they will look out in fear, thinking perhaps they have been taken out of Paradise. Then it will be asked of them, "Do you recognize this?" They will say, "Yes (O Lord), this is death." Then the people of Hell will be called and asked, "Do you recognize this?" They will say, "Yes, this is death." Then, by Allah's command, it will be slaughtered on the Bridge of Sirat, and both groups will be told, "The state in which you are now, you will remain in it forever."