Translation
(11) Friday Prayer
كتاب الجمعة
(16) Chapter: The time for the Jumu'ah (prayer) is due when the sun declines (i.e. just after mid-day)
(16) باب وَقْتُ الْجُمُعَةِ إِذَا زَالَتِ الشَّمْسُ
Sahih al-Bukhari 905 

Narrated Anas bin Malik:

We used to offer the Jumua prayer early and then have an afternoon nap.

حَدَّثَنَا عَبْدَانُ، قَالَ أَخْبَرَنَا عَبْدُ اللَّهِ، قَالَ أَخْبَرَنَا حُمَيْدٌ، عَنْ أَنَسٍ، قَالَ كُنَّا نُبَكِّرُ بِالْجُمُعَةِ، وَنَقِيلُ بَعْدَ الْجُمُعَةِ‏.‏
Reference : Sahih al-Bukhari 905
In-book reference : Book 11, Hadith 29
USC-MSA web (English) reference : Vol. 2, Book 13, Hadith 28
  (deprecated numbering scheme)