Question 533: Do the Prophet’s bodies decompose in graves?
Answer: Allaah prohibited the Earth to decompose dead bodies of the Prophets and Messengers. Therefore the dead bodies of Prophets never decompose; they stay alive in their graves and lead another life in Barzakh (period between death and the Resurrection). Allaah Alone knows about such a life. Such a life is different from life in this world. The souls of Prophets are in Paradise and the same applies to the souls of believers and our Prophet Muhammad whose soul is with the Higher Companion in Paradise according to the Hadeeth narrated by Imaam Ahmad in his Musnad, Vol 4, page 8, from Aws ibn Aboo Awsin the end of which he mentioned: Allaah, the Exalted, has prohibited the earth from consuming the bodies of Prophets (peace be upon them). Narrated by ‘Aboo Daawood, and Ibn Maajah in their Sunan with a similar wording but an authentic Isnaad (chain of narrators)... read more here.