‘Umar led us in praying Fajr in Jam', then he stood up and said: The mushrikoon used not to depart until the sun rose, but the Messenger of Allah ﷺ differed from them and moved on before the sun rose.
وَقَالَ إِنَّ الْمُشْرِكِينَ كَانُوا لَا يُفِيضُونَ حَتَّى تَطْلُعَ الشَّمْسُ وَإِنَّ رَسُولَ اللهِ ﷺ خَالَفَهُمْ ثُمَّ أَفَاضَ قَبْلَ أَنْ تَطْلُعَ الشَّمْسُ