The Messenger of Allah ﷺ said: “Whoever introduces into this matter of ours something that is not part of it, it is rejected.”

قَالَ رَسُولُ اللَّهِ ﷺ: «مَنْ أَحْدَثَ فِي أَمْرِنَا هَذَا مَا لَيْسَ مِنْهُ فَهُوَ رَدٌّ»۔

I asked al-Qasim b. Muhammad about a man who has three dwellings and bequeathed one third of each dwelling. He said: All of that is combined into a single dwelling. Then he said: Aishah told me that the Messenger of Allah ﷺ said: “Whoever does a deed that is not in accordance with our command, it is rejected.”

سَأَلْتُ الْقَاسِمَ بْنَ مُحَمَّدٍ عَنْ رَجُلٍ لَهُ ثَلاَثَةُ مَسَاكِنَ فَأَوْصَى بِثُلُثِ كُلِّ مَسْكَنٍ مِنْهَا قَالَ: يُجْمَعُ ذَلِكَ كُلُّهُ فِي مَسْكَنٍ وَاحِدٍ. ثُمَّ قَالَ: أَخْبَرَتْنِي عَائِشَةُ أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ: «مَنْ عَمِلَ عَمَلاً لَيْسَ عَلَيْهِ أَمْرُنَا فَهُوَ رَدٌّ».