Hasan al-Basri (may Allah have mercy on him) said: "When a woman buys a part of her husband, she becomes forbidden to him and she becomes a completely divorced woman (mutaallaqah bainah), and if she frees him, the same ruling will apply."
Hadith Referenceسنن سعید بن منصور / كتاب النكاح / 2060
Hadith Takhrij«أخرجه سعيد بن منصور فى «سننه» ترقيم الدرالسلفية برقم:، 883، وابن أبى شيبة فى «مصنفه» برقم: 16740»