Jumu`ah prayer is when the sun has passed its zenith Sahih Muslim 858 b
Arabic hadith text
وَحَدَّثَنِي الْقَاسِمُ بْنُ زَكَرِيَّاءَ، حَدَّثَنَا خَالِدُ بْنُ مَخْلَدٍ، ح وَحَدَّثَنِي عَبْدُ اللَّهِ بْنُ عَبْدِ، الرَّحْمَنِ الدَّارِمِيُّ حَدَّثَنَا يَحْيَى بْنُ حَسَّانَ، قَالاَ جَمِيعًا حَدَّثَنَا سُلَيْمَانُ بْنُ بِلاَلٍ، عَنْ جَعْفَرٍ، عَنْ أَبِيهِ، أَنَّهُ سَأَلَ جَابِرَ بْنَ عَبْدِ اللَّهِمَتَى كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُصَلِّي الْجُمُعَةَ قَالَ كَانَ يُصَلِّي ثُمَّ نَذْهَبُ إِلَى جِمَالِنَا فَنُرِيحُهَا .زَادَ عَبْدُ اللَّهِ فِي حَدِيثِهِ حِينَ تَزُولُ الشَّمْسُ يَعْنِي النَّوَاضِحَ
Translation
Ja'far reported on the authority of his father
that he asked Jabir b. 'Abdullah when the Messenger of Allah (ﷺ) observed Jumu'a prayer. He said: He used to observe prayer, and we then went (back) to our camels and gave them rest. 'Abdullah made this addition in his narration: "Till the sun passed the meridian. and the camels used for carrying water (took rest)."