It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that during the blessed era of the Prophet (peace and blessings be upon him), all the people used to perform ablution together from the same vessel. I asked Imam Malik (may Allah have mercy on him), "Men and women, all together?" He replied, "Yes!" I asked, "In the time of the Prophet (peace and blessings be upon him)?" He replied, "Yes."