كتاب البيوع
7  
Business Transactions
Narrated 'Amr bin Shu'aib on his father'ss authority from his grandfather (RA):
Allah's Messenger (ﷺ) said: "It is not permissible to give a gift without her husband's permission."
وَعَنْ عَمْرِو بْنِ شُعَيْبٍ, عَنْ أَبِيهِ, عَنْ جَدِّهِ; أَنَّ رَسُولَ اَللَّهِ ‏- صلى الله عليه وسلم ‏-قَالَ: { لَا يَجُوزُ لِاِمْرَأَةٍ عَطِيَّةٌ إِلَّا بِإِذْنِ زَوْجِهَا }

Sunnah.com reference : Book 7, Hadith 112
English translation : Book 7, Hadith 874
Arabic reference : Book 7, Hadith 870