Sahih Muslim
The Book of Bequests (Kitab Al-Wasiyya)
Book Number: 013 / Hadith Number: 3998
Humaid b. Abd al-Rahmin al-Himayri reported on the authority of the three of the sons of Sa'd: They said: Sa'd fell ill in Mecca. Allah's Messenger (may peace be upon him) visited him to inquire after his health. The rest of the hadith is the same.