From Sahih Muslim (Hadith 1989):
Jabir b. 'Abdullah reported:We used to observe (Jumu'a) prayer with the Messenger of Allah (ﷺ) 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
Reference: Muslim 1989