Qatadah narrates that Sayyiduna Ali, Sayyiduna Ibn Mas'ud and Sayyiduna Ibn Abbas (may Allah be pleased with them) said: "When the four months pass, it counts as one divorce, and the woman has more right over herself." Qatadah said: Sayyiduna Ali and Sayyiduna Ibn Mas'ud (may Allah be pleased with them both) said: "She observes the waiting period of a divorced woman."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9604