Musannaf Ibn Abi Shayba 13:832

Abu Bakr narrated to us, he said: Abd al-Wahhab [al-Khaffaf] narrated to us, from Ibn Abi Arubah, from Qatadah, from Sa’id ibn al-Musayyib, that he used to see no harm in a partner selling to his partner [his share] before he had divided it, except for what is measured by volume and what is measured by weight.