Sahih Muslim
The Book of Zakat (Kitab Al-Zakat)
Book Number: 005 / Hadith Number: 2222
Jarir b. 'Abdullah reported: People came to to the Messenger of Allah (may peace be upon him) and they ware dressed in woollen clothes. He (the Holy Prophet) saw their dismal state, as they were suffering from want and the rest of the hadith is the same.