Imam Darimi : 2745

أَخْبَرَنَا عُبَيْدُ اللَّهِ بْنُ مُوسَى عَنْ ابْنِ أَبِي لَيْلَى عَنْ عَامِرٍ الشَّعْبِيِّ عَنْ عَلِيٍّ فِي امْرَأَةٍ وَأَبَوَيْنِ قَالَ مِنْ أَرْبَعَةٍ لِلْمَرْأَةِ الرُّبُعُ وَلِلْأُمِّ ثُلُثُ مَا بَقِيَ وَمَا بَقِيَ فَلِلْأَبِ

Narrated to us [Ubaidullah bin Musa] from [Ibn Abu Laila] from [Amir Asy Sya'bi] from [Ali] about a wife and both parents. He said:Of the four (as long as the problem is four), the wife gets a quarter, the mother gets the remaining third (of the assets) and the remaining one goes to the father.