Sayyidah Umm Atiyyah (may Allah be pleased with her) said: We pledged allegiance to the Messenger of Allah (peace and blessings be upon him), and among the good things he (peace and blessings be upon him) commanded us was that we would not wail (over the dead). A woman said: O Messenger of Allah! The family of so-and-so helped me in wailing; I will not pledge allegiance to you until I help them. Umm Atiyyah (may Allah be pleased with her) said: So I helped them, and then pledged allegiance to him (peace and blessings be upon him). Not one woman among us fulfilled this pledge except me and Umm Sulaym.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21598