Mishkat al-Masabih
‘A’isha reported God’s messenger as saying, “If anyone introduces into this affair of ours anything which does not belong to it, it is rejected.” (Bukhari and Muslim.)
عَنْ عَائِشَةَ قَالَتْ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ أَحْدَثَ فِي أَمْرِنَا هَذَا مَا لَيْسَ مِنْهُ فَهُوَ رد»
Grade: Muttafaqun 'alayh (Zubair `Aliza'i)
مُتَّفق عَلَيْهِ
Reference