It is narrated from Nafi‘ (may Allah have mercy on him) that Ibn ‘Umar (may Allah be pleased with him) used to say: When a man gives his wife the authority to divorce, then the decision is as the woman makes, except if the man denies it and says, “I intended only one divorce (i.e., I gave her the authority for one divorce),” and he swears an oath to that effect. And the husband has more authority over her as long as she is in her ‘iddah (waiting period).
Hadith Referenceمسند الإمام الشافعي / كتاب الرجعة / 1286
Hadith Takhrijاسناده صحیح اخرجه البیهقی: 348/7 ۔ وفي المعرفة السنن والآثار له (4446) - وعبد الرزاق (11905) ، (11906) - ومالك فى الموطأ، الطلاق، باب ما يبين من التمليك۔