Prayer (Kitab Al-Salat)
2/21. Chapter:
Separating The Women From The Men In The Masjid
Sunan Abi Dawud
حَدَّثَنَا مُحَمَّدُ بْنُ قُدَامَةَ بْنِ أَعْيَنَ، حَدَّثَنَا إِسْمَاعِيلُ، عَنْ أَيُّوبَ، عَنْ نَافِعٍ، قَالَ قَالَ عُمَرُ بْنُ الْخَطَّابِ - رضى الله عنه - فَذَكَرَهُ بِمَعْنَاهُ وَهُوَ أَصَحُّ .
This tradition has been reported by 'Umar b. al-Khattab through a different chain of narrators. He narrated it to the same effect and that is more correct.
Reference : Sunan Abi Dawud 463In-book reference : Book 2, Hadith 73English translation : Book 2, Hadith 463