Chapter 43: The Book of ad-Dahaya (Sacrifices)
It was narrated from 'Asim bin Kulaib that his father said: "We were on a journey and the day of Al-adha came, so we started to by sheep, a Musinnah for two or three Jadh' ahs. A man from Muzainah said to us: 'We were with the Messenger of Allah on a journey when this came, and we stated to look for sheep, (offering to buy) a Musinnah for two or three Jadh' ahs. Then the Messenger of Allah said: "A Jadh' ah is sufficient for that for which a Thani is sufficient."
Sunan an-Nasa'i 4383