It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The best rows of the men are the first rows, and the best rows of the women are the last rows." He (peace and blessings be upon him) used to command the men to keep their arms away from their sides in prostration, and to command the women to prostrate drawn together; he used to command the men to lay down the left foot and keep the right one upright in the tashahhud, and to command the women to sit cross-legged. And he said: "O assembly of women! Do not raise your gaze in your prayer, but keep it lowered, so that you do not look at the private parts of the men."
The first and the last wordings of this hadith are well known from the Prophet (peace and blessings be upon him), and what is between them is munkar (rejected). And Allah knows best.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3198