مُوَطَّأُ مَالِكٍ
Muwatta Malik 1254
Divorce
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّهُ كَانَ يَقُولُ لاَ تَبِيتُ الْمُتَوَفَّى عَنْهَا زَوْجُهَا وَلاَ الْمَبْتُوتَةُ إِلاَّ فِي بَيْتِهَا .
Yahya related to me from Malik from Nafi that Abdullan ibn Umar said, "The only place a woman whose husband has died and a woman who is absolutely divorced can spend the night is in their houses."
Arabic/English book reference: Book 29, Hadith 90