A female slave, whose husband is a slave, has the option to keep him or leave him (when she is manumitted).

Sahih al-Bukhari · Book 68 · Hadith 5280

حَدَّثَنَا أَبُو الْوَلِيدِ، حَدَّثَنَا شُعْبَةُ، وَهَمَّامٌ، عَنْ قَتَادَةَ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ رَأَيْتُهُ عَبْدًا يَعْنِي زَوْجَ بَرِيرَةَ‏.‏

Narrated Ibn `Abbas: I saw him as a slave, (namely, Barira's husband).

Sahih al-Bukhari · Book 68 · Hadith 5281

حَدَّثَنَا عَبْدُ الأَعْلَى بْنُ حَمَّادٍ، حَدَّثَنَا وُهَيْبٌ، حَدَّثَنَا أَيُّوبُ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ ذَاكَ مُغِيثٌ عَبْدُ بَنِي فُلاَنٍ ـ يَعْنِي زَوْجَ بَرِيرَةَ ـ كَأَنِّي أَنْظُرُ إِلَيْهِ يَتْبَعُهَا فِي سِكَكِ الْمَدِينَةِ، يَبْكِي عَلَيْهَا‏.‏

Narrated Ibn `Abbas: That was Mughith, the slave of Bani so-and-so, i.e., Barira's husband as if I am now looking at him following her (Barira) along the streets of Medina.