Sunan Ibn Majah 28
It was narrated that Qarazah bin Ka'b said:
"Umar bin Al-Khattab sent us to Kufah, and he accompanied us as far as a place called Sirar. He said: 'Do you know why I walked with you?' We said: 'Because of the rights of the Messenger of Allah (ﷺ) and because of the rights of the Ansar.' He said: 'No, rather it is because of words that I wanted to say to you. I wanted you to memorize it due to my walking with you. You are going to people in whose hearts the Qur'an bubbles like water in a copper cauldron. When they see you, they will look up at you, saying: "The Companions of Muhammad!" But do not recite many reports from the Messenger of Allah (ﷺ), then I will be your partner."
حَدَّثَنَا أَحْمَدُ بْنُ عَبْدَةَ، حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، عَنْ مُجَالِدٍ، عَنِ الشَّعْبِيِّ، عَنْ قَرَظَةَ بْنِ كَعْبٍ، قَالَ بَعَثَنَا عُمَرُ بْنُ الْخَطَّابِ إِلَى الْكُوفَةِ وَشَيَّعَنَا فَمَشَى مَعَنَا إِلَى مَوْضِعٍ يُقَالُ لَهُ صِرَارٌ ‏.‏ فَقَالَ أَتَدْرُونَ لِمَ مَشَيْتُ مَعَكُمْ قَالَ قُلْنَا لِحَقِّ صُحْبَةِ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ وَلِحَقِّ الأَنْصَارِ ‏.‏ قَالَ لَكِنِّي مَشَيْتُ مَعَكُمْ لِحَدِيثٍ أَرَدْتُ أَنْ أُحَدِّثَكُمْ بِهِ فَأَرَدْتُ أَنْ تَحْفَظُوهُ لِمَمْشَاىَ مَعَكُمْ إِنَّكُمْ تَقْدُمُونَ عَلَى قَوْمٍ لِلْقُرْآنِ فِي صُدُورِهِمْ هَزِيزٌ كَهَزِيزِ الْمِرْجَلِ فَإِذَا رَأَوْكُمْ مَدُّوا إِلَيْكُمْ أَعْنَاقَهُمْ وَقَالُوا أَصْحَابُ مُحَمَّدٍ ‏.‏ فَأَقِلُّوا الرِّوَايَةَ عَنْ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ ثُمَّ أَنَا شَرِيكُكُمْ ‏.‏