Imam Ahmad : 24535

حَدَّثَنَا وَكِيعٌ حَدَّثَنَا هِشَامٌ عَنْ أَبِيهِ عَنْ عَائِشَةَ قَالَتْ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَا كَانَ مِنْ شَرْطٍ لَيْسَ فِي كِتَابِ اللَّهِ فَهُوَ بَاطِلٌ وَإِنْ كَانَ مِائَةَ شَرْطٍ

Narrated to us [Waqi'] Narrated to us [Hisham] from [his father] from [Aisha] said: The ProphetPeace be upon him'alaihi wa sallam said: "There is no requirement that is not in the Book of Allah but it is false, even if it contains a hundred requirements.