Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) did not give me any instruction concerning the "awqas" of cattle (the explanation of this will come in the next narration).
Ahmad recorded it; its narrators are the narrators of the Sahih. (Allamah al-Haythami says:) I say: However, this narration is mursal, because Tawus narrated it from Sayyiduna Mu'adh (may Allah be pleased with him), and Tawus did not hear from him.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الزكاة / 4389