When the Messenger of Allah ﷺ conquered Mecca, he stood to deliver a sermon, and in it he said, "It is not permissible for a woman to give a gift except with her husband's permission." Abridged.
أخبرنا إسمعيل بن مسعود قال حدثنا خالد بن الحارث قال حدثنا حسين المعلم عن عمرو بن شعيب أن أباه حدثه
لما فتح رسول الله ﷺ مكة قام خطيبا فقال في خطبته لا يجوز لامرأة عطية إلا بإذن زوجها مختصر
[Its isnad is hasan] Abu Dawud narrated it in the Book of Business Transactions, chapter on a woman's gift given without her husband's permission, hadith no. 3547, from the hadith of Khalid bin Harith, with this chain, and it is also found in Kubra, hadith no. 2320.