Arabic hadith text
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، أَنَّهُ قَالَ الْمُحْصَنَاتُ مِنَ النِّسَاءِ هُنَّ أُولاَتُ الأَزْوَاجِ وَيَرْجِعُ ذَلِكَ إِلَى أَنَّ اللَّهَ حَرَّمَ الزِّنَا ‏.‏
Translation

Yahya related to me from Malik from Ibn Shihab that Said ibn al-Musayyab said, "The muhsanat among women are those who have husbands."That referred to the fact that Allah has made fornication haram.