Not graded
Sunan ad-Darimi 3367
حَدَّثَنَا الْعَبَّاسُ بْنُ سُفْيَانَ عَنْ ابْنِ عُلَيَّةَ عَنْ ابْنِ عَوْنٍ عَنْ مُحَمَّدٍ قَالَ كَانُوا يَرَوْنَ هَذِهِ الْأَلْحَانَ فِي الْقُرْآنِ مُحْدَثَةً
This hadith has no English translation yet: the Arabic text, the reference and the grade are shown here.
Reported by Ad-Darimi (No. 3367).