What is the rule regarding building lineage (*tabanni*) on the waiting period of a slave woman if the divorce is irrevocable (*ba'in*) or due to the husband's death?

Primary text

Lineage is established based on the waiting period of a slave woman if her divorce was irrevocable (*ba'in*) or if the divorce occurred due to the husband's death. If the divorce was revocable (*raj'iyyah*), lineage is established based on the waiting period of a free woman, according to previous rulings.