Sahih Muslim Book 31, Hadith Number 6131.

Chapter : The merits of the tribes of Ghifir, Ashia’, Muzaina, Tamim, Daws and Tayyi.

‘Adi b. Hatim reported: I came to Umar b. Khattab and he said to me: The first consignment of Sadaqa brought to Allah’s Messenger (may peace be upon him) which brightened the face of Allah’s Messenger (may peace be upon him) and the faces of his Companions was that of Tayyi.