Sahih Muslim Book 13, Hadith Number 4010.

Chapter : He who has not anything with him to will away should not do it.

This hadith has been narrated on the authority of Malik b. Mighwal with the same chain of transmitters but with a slight variation of words. In the hadith related by Waki (the words are) “I said: How the people have been ordered about the will”; and in the hadith of Ibn Numair (the words are): “How the will has been prescribed for the Muslims,’.