Sunan An-Nasa'i

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)