Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) said: "In the time of the Messenger of Allah (peace and blessings be upon him), the women were instructed during the prayer not to raise their heads until the men had taken their places on the ground, because of the looseness of the garments."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5742