Full Sharh — Musnad Ahmad 363
حَدَّثَنَا وَكِيعٌ، عَنْ سُفْيَانَ، عَنْ أَبِي إِسْحَاقَ، عَنْ عَمْرِو بْنِ مَيْمُونٍ، عَنْ عُمَرَ، رَضِيَ اللَّهُ عَنْهُ قَالَ كَانَ أَهْلُ الْجَاهِلِيَّةِ لَا يُفِيضُونَ مِنْ جَمْعٍ حَتَّى يَقُولُوا أَشْرِقْ ثَبِيرُ كَيْمَا نُغِيرُ فَلَمَّا جَاءَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ خَالَفَهُمْ فَكَانَ يَدْفَعُ مِنْ جَمْعٍ مِقْدَارَ صَلَاةِ الْمُسْفِرِينَ بِصَلَاةِ الْغَدَاةِ قَبْلَ طُلُوعِ الشَّمْسِ.
English Translation
It was narrated that ‘Umar (رضي الله عنه) said:: The people of Jahiliyyah used not to move on from Jam’ until they said: Shine, Thabeer, so that we may move on quickly. When the Messenger of Allah (ﷺ) came, he differed from them and he used to move on from Jam’ before sunrise, like the time when people who delay Fajr usually pray.
Source
Musnad Ahmad(مسند أحمد)
Musnad `Umar b. al-Khattab (ra)
Hadith Number
363