Muwatta Malik 1253

Arabic

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّهُ قَالَ عِدَّةُ أُمِّ الْوَلَدِ إِذَا تُوُفِّيَ عَنْهَا سَيِّدُهَا حَيْضَةٌ ‏.‏

Translation

Malik related to me from Nafi that Abdullah ibn Umar said, "The idda of an umm walad when her master dies is one menstrual period

Authenticity

Sahih · Salim al-Hilali

Reference