I have been informed that the chiefs were twelve in number, and he named Ubada among them.
حدثنا أبو سعيد مولى بني هاشم عن حرب بن شداد قال سمعت
بلغني أن النقباء اثنا عشر فسمى عبادة فيهم
No references are available.
Its isnad is sahih, and it is similar to the one before it. See Bukhari 7/219, no. 3892, Fath.