حَدَّثَنَا عَمْرُو بْنُ عَوْنٍ، حَدَّثَنَا هُشَيْمٌ، عَنِ الْعَوَّامِ بْنِ حَوْشَبٍ، عَنْ سَعِيدِ بْنِ جُمْهَانَ، عَنْ سَفِينَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ خِلاَفَةُ النُّبُوَّةِ ثَلاَثُونَ سَنَةً ثُمَّ يُؤْتِي اللَّهُ الْمُلْكَ مَنْ يَشَاءُ - أَوْ مُلْكَهُ مَنْ يَشَاءُ - ‏"‏ ‏.‏

Safinah reported the Messenger of Allah (PBUH) as saying: The caliphate of Prophecy will last thirty years; then Allah will give the Kingdom to whom he wishes; or his kingdom to whom he wishes. Translation Not Available

Book Ref: Sunan Abi Dawud Book 42 Hadith 4647
Web Ref:  Sunan Abi Dawud Book 41 Hadith 4630