She had pledged allegiance to the Prophet ﷺ. She said, "We did not consider yellowish or brownish discharge after the period of purity to be anything of significance."
حدثنا موسى بن إسمعيل أخبرنا حماد عن قتادة عن أم الهذيل
وكانت بايعت النبي ﷺ قالت كنا لا نعد الكدرة والصفرة بعد الطهر شيئا
[Sahih] Bayhaqi narrated it in 1/337 from the hadith of Abu Dawud with the same wording, and Hakim graded it sahih according to the criteria of the two Shaykhs in 12/174, 175, and Dhahabi agreed with him (!). Ibn Majah narrated it as no. 647 from the hadith of Umm Huzayl Hafsa with the same wording.