مشكوة المصابيح Mishkat al-Masabih كتاب العتق The Book of Emancipation
(أُمُّ الْوَلَدِ تُحَرَّرُ بَعْدَ وَفَاةِ سَيِّدِهَا)

(An Umm Walad is freed after her master’s death)

1 hadith
Hadith 3394
وَعَنِ ابْنِ عَبَّاسٍ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «إِذَا وَلَدَتْ أَمَةُ الرَّجُلِ مِنْهُ فَهِيَ مُعْتَقَةٌ عَنْ دُبُرٍ مِنْهُ أَوْ بَعْدَهُ» . رَوَاهُ الدَّارِمِيُّ
Ibn ‘Abbas reported the Prophet as saying, “When a man’s slave-woman bears him a child she becomes free at his death.”* Darimi transmitted it. * The text has 'au durbur in minhu au ba'dahu’ indicating a doubt on the part of a transmitter as to which words were used. Both expressions amount to the same thing so it seems sufficient to give "at his death" in the translation above.
Hadith Reference Mishkat al-Masabih / The Book of Emancipation / Hadith: 3394
Hadith Grading الألبانی: لم تتمّ دراسته  |  زبیر علی زئی: إسناده ضعيف
Hadith Takhrij ´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «إسناده ضعيف، رواه الدارمي (257/2 ح 2577) [و ابن ماجه (2515) ]¤٭ فيه حسين بن عبد الله: ضعيف و شريک القاضي مدلس و عنعن .»