Sahih Muslim Book 4, Hadith Number 1869.

Chapter : Excellence of one who listens to the Khutba with perfect silence.

Jabir b. ‘Abdullah reported: We used to observe (Jumu’a) prayer with the Messenger of Allah (may peace be upon him) and then we returned and gave rest to our camels used for carrying water. Hassan (one of the narrators) said: I asked Ja’far what time that was. He said: It is the time when the sun passes the meridian.