Not graded
Sunan ad-Darimi 867
أَخْبَرَنَا أَبُو النُّعْمَانِ حَدَّثَنَا عَبْدُ الْوَاحِدِ عَنْ الْحَجَّاجِ قَالَ سَأَلْتُ عَطَاءً عَنْ الْمَرْأَةِ تَطْهُرُ مِنْ الْمَحِيضِ ثُمَّ تَرَى الصُّفْرَةَ قَالَ تَوَضَّأُ
This hadith has no English translation yet: the Arabic text, the reference and the grade are shown here.
Reported by Ad-Darimi (No. 867).