إِنَّ اللَّهَ عَزَّ وَجَلَّ حَرَّمَ عَلَى الْأَرْضِ أَجْسَادَ الْأَنْبِيَاءِ
Allah, Mighty and Majestic, has forbidden the earth to consume the bodies of the Prophets. (Hadith of Aws ibn Aws)
This affirms the preservation of the Prophets’ pure bodies as a special honor from Allah. The ordinary pattern of bodily decay is not applied to their blessed remains.