Musnad Ahmad 33:426

Yahya ibn Adam and Abu Ahmad narrated to us, they said: Abd al-Hamid ibn Yazid al-Ansari narrated to us—Abu Ahmad said: "a Medinan"—from Uqbah ibn Abd al-Rahman ibn Jabir, from Jabir, who said: "We used to pray Jumu'ah with the Messenger of Allah, may Allah bless him and grant him peace, then we would return and take a midday nap (qaylulah)." Abu Ahmad said: "Then we would return to Banu Salamah and take a midday nap, and it was a mile away."