Prophets are alive in their graves
By the grace of ALLAH! All of the Prophets are alive. In this regard, a Hadis of Ibn Majah states: Without doubt, ALLAH has made it forbidden for the earth to decay the bodies of the Prophets. The Prophet of ALLAH is alive and is given sustenance.
(Sunan Ibn Majah, vol. 2, pp. 291, Hadis 1637)