He is Ibn Hasan bin Ali. He said, we asked Jabir bin Abdullah about the prayer of the Prophet ﷺ, and he replied, "He used to pray Dhuhr at midday when the sun was at its peak, Asr while the sun was still bright and lively, Maghrib as soon as the sun had set, Isha early when many people had gathered and later when they were few, and Fajr in the darkness before dawn."
حدثنا مسلم بن إبراهيم قال حدثنا شعبة عن سعد بن إبراهيم
هو ابن الحسن بن علي قال سألنا جابر بن عبد الله عن صلاة النبي ﷺ فقال كان يصلي الظهر بالهاجرة والعصر والشمس حية والمغرب إذا وجبت والعشاء إذا كثر الناس عجل وإذا قلوا أخر والصبح بغلس