Musnad Abu Ya'la al-Mawsili 154:129

Abu Khaythama narrated to us, Abdullah bin Yazid al-Muqri narrated to us, Abd al-Jabbar al-Ayli narrated to us, he said: Yazid bin Abi Sumayya narrated to me, from Abdullah bin Umar, that he said: Umm Sulaym asked the Messenger of Allah, may Allah bless him and grant him peace, about the woman who sees in a dream what the man sees. The Messenger of Allah, may Allah bless him and grant him peace, said to her: "If a woman sees that and discharges, then she must perform ghusl (ritual bath)."