Sahih Muslim Book - 30, Hadith - 4493

وَحَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ وَعَبْدُ بْنُ حُمَيْدٍ جَمِيعًا عَنْ أَبِى عَامِرٍ قَالَ عَبْدٌ حَدَّثَنَا عَبْدُ الْمَلِكِ بْنُ عَمْرٍو حَدَّثَنَا عَبْدُ اللَّهِ بْنُ جَعْفَرٍ الزُّهْرِىُّ عَنْ سَعْدِ بْنِ إِبْرَاهِيمَ قَالَ سَأَلْتُ الْقَاسِمَ بْنَ مُحَمَّدٍ عَنْ رَجُلٍ لَهُ ثَلاَثَةُ مَسَاكِنَ فَأَوْصَى بِثُلُثِ كُلِّ مَسْكَنٍ مِنْهَا قَالَ يُجْمَعُ ذَلِكَ كُلُّهُ فِى مَسْكَنٍ وَاحِدٍ ثُمَّ قَالَ أَخْبَرَتْنِى عَائِشَةُ أَنَّ رَسُولَ اللَّهِ -صلى الله عليه وسلم- قَالَ « مَنْ عَمِلَ عَمَلاً لَيْسَ عَلَيْهِ أَمْرُنَا فَهُوَ رَدٌّ ».

It was narrated that Sa'd bin Ibrahim said: I asked Al-Qasim bin Muhammad about a man who had three dwellings and left a will concerning one third of each dwelling. He said: That could all be combined in one dwelling. Then he said: 'Aishah told me that the Messenger of Allah (s.a.w) said: "Whoever does something that is not in accordance with this matter of ours will have it rejected."