Sunan an-Nasa'i 4243

It was narrated from Salamah bin Al-Muhabbaq that:during the campaign of Tabuk, the Prophet of Allah called for water from a woman. She said: "I only have a waterskin of mine made from an (unslaughtered) dead animal." He said: "Didn't you tan it?" She said: "Of course." He said: "Then it's tanning is its slaughter". (Daif)