Not graded
Sunan ad-Darimi 1042
أَخْبَرَنَا خَالِدٌ حَدَّثَنَا مَالِكٌ عَنْ نَافِعٍ قَالَ كُنَّ جَوَارِي ابْنِ عُمَرَ يَغْسِلْنَ رِجْلَيْهِ وَهُنَّ حُيَّضٌ وَيُعْطِينَهُ الْخُمْرَةَ
This hadith has no English translation yet: the Arabic text, the reference and the grade are shown here.
Reported by Ad-Darimi (No. 1042).