We were told by ʿAbbās ibn al-Walīd, who said: We were told by Yazīd ibn Zurayʿ, who said: We were told by Saʿīd, on the authority of Qatādah, that Anas ibn Mālik told them that Umm Sulaym related that she asked the Prophet of God, peace and blessings be upon him, about a woman who sees in her dream what a man sees. The Messenger of God, peace and blessings be upon him, said: "If a woman sees that, let her perform the ritual bath." Umm Sulaym said: "And I felt shy about that." She said: "Does this really happen?" The Prophet of God, peace and blessings be upon him, said: "Yes. For how else would resemblance occur? The man's fluid is thick and white, and the woman's fluid is thin and yellow. Whichever of the two prevails or comes first, from it the resemblance is derived."