Abu Bakr wrote to me what was made compulsory by Allah's Messenger (ﷺ) and that was (regarding the payments of Zakat): Neither the property of different people may be taken together nor the joint property may be split for fear of (paying more, or receiving less) Zakat.
Sahih al-Bukhari Book 24, Hadith 53
← Previous Hadith I am a witness that Allah's Messenger (ﷺ) offered the Id prayer before delivering the sermon and then he thought that the women would not be able to hear him (because of the distance), so he went to them along with Bilal who was spreading his garment. The Prophet (ﷺ) advised and ordered them to give in charity. So the women started giving their ornaments (in charity). (The sub-narrator Aiyub pointed towards his ears and neck meaning that they gave ornaments from those places such as earrings and necklaces.)

Sahih al-Bukhari Book 24, Hadith 52 Next Hadith → Abu Bakr wrote to me what Allah's Messenger (ﷺ) has made compulsory (regarding Zakat) and this was mentioned in it: If a property is equally owned by two partners, they should pay the combined Zakat and it will be considered that both of them have paid their Zakat equally.

Sahih al-Bukhari Book 24, Hadith 54