From Sahih Muslim (Hadith 4228):
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
Reference: Muslim 4228