The Prophet ﷺ came to visit her and asked, "Do you have any dharirah powder?"She replied, "Yes."He called for it and applied it to a pustule between his toes, then said, "Allah, You who diminish what is great and magnify what is small, take this away from me." And it subsided.
حدثنا روح حدثنا ابن جريج أخبرني عمرو بن يحيى بن عمارة بن أبي حسن حدثتني مريم ابنة إياس بن البكير صاحب النبي ﷺ
أن النبي ﷺ دخل عليها فقال أعندك ذريرة قالت نعم فدعا بها فوضعها على بثرة بين أصابع رجليه ثم قال اللهم مطفئ الكبير ومكبر الصغير أطفها عني فطفئت
Its isnad is sahih. Maryam bint Iyas bin Bukayr is accepted (maqbulah) among the female Successors. The hadith was narrated by Hakim, 4/207, who graded it sahih, and Dhahabi agreed with him. Haythami, 5/195, indicated its soundness despite Maryam being the sole narrator.