Hazim bin Muhammad al-Ghifari narrates from his mother Hammadah bint Muhammad bin Abd al-Rahman bin Abi Layla, who was the eldest child of Muhammad. She said: I heard my paternal aunt saying: I saw Umm Layla (may Allah be pleased with her) dyeing her shift, her head-covering and her wrap once every month, and she would apply dye to her body and her feet completely, and she would say: It was on this that we gave the pledge of allegiance to the Messenger of Allah (peace and blessings be upon him). She said: And I saw her with two gold bracelets on her hand, and people thought they were from the war booty. Abd al-Rahman bin Abi Layla used to do the dyeing for her.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21797