Musannaf Ibn Abi Shaybah 39022 — Zakah on what exceeds the threshold

Asim bin Kulayb narrates from his father: We used to be on jihad, and our commander was always one of the Companions. We were in Persia, and our commander was a Companion of the Messenger (peace and blessings be upon him) from the tribe of Muzaynah. Two-year-old calves became expensive for us (for the sacrifice), until we would buy one musinn (a two-year-old) for two or three jadha'ahs (a one-year-old cow). This (Companion of the Messenger (peace and blessings be upon him)) stood up and said: We too had such a day, when two-year-olds came to us at a high price, until we (too) would buy a musinn by giving two or three jadha'ahs. Then the Prophet (peace and blessings be upon him) stood among us and said: "A musinn animal suffices wherever a thani suffices."