حَدَّثَنَا مُحَمَّدُ بْنُ رُمْحٍ، أَنْبَأَنَا عَبْدُ اللَّهِ بْنُ لَهِيعَةَ، عَنْ عُقَيْلٍ، أَنَّهُ سَمِعَ نَافِعًا، يُخْبِرُ عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ مَا كَانَ مِنْ مِيرَاثٍ قُسِمَ فِي الْجَاهِلِيَّةِ فَهُوَ عَلَى قِسْمَةِ الْجَاهِلِيَّةِ وَمَا كَانَ مِنْ مِيرَاثٍ أَدْرَكَهُ الإِسْلاَمُ فَهُوَ عَلَى قِسْمَةِ الإِسْلاَمِ ‏"‏ ‏.‏

It wasnarrated from ‘Abdullah bin ‘Umar that the Messenger of Allah(PBUH) said: “Whatever division of inheritance was made during theIgnorance period, stands according to the division of the Ignoranceperiod, and whatever division of inheritance was made during Islam,itstands according to the division of Islam.” Translation Not Available

Book Ref: Sunan Ibn Majah Book 23 Hadith 2749
Web Ref:  Sunan Ibn Majah Vol 4 Book 23 Hadith 2749