"I heard Rafi' bin Khadij say: 'We used to perform the Maghrib at the time of the Messenger of Allah, and one of us would be able to see the places where his arrows would land when shot from his bow.'" (Sahih)Another chain with similar wording.  

سَمِعْتُ رَافِعَ بْنَ خَدِيجٍ يَقُولُ كُنَّا نُصَلِّي الْمَغْرِبَ عَلَى عَهْدِ رَسُولِ اللَّهِ ﷺ فَيَنْصَرِفُ أَحَدُنَا وَإِنَّهُ لَيَنْظُرُ إِلَى مَوَاقِعِ نَبْلِهِ حَدَّثَنَا أَبُو يَحْيَى الزَّعْفَرَانِيُّ حَدَّثَنَا إِبْرَاهِيمُ بْنُ مُوسَى نَحْوَهُ  

He used to pray the Maghrib with the Messenger of Allah when the sun set.  

أَنَّهُ كَانَ يُصَلِّي مَعَ النَّبِيِّ ﷺ الْمَغْرِبَ إِذَا تَوَارَتْ بِالْحِجَابِ  

"The Messenger of Allah said: 'My Ummah will continue to adhere to the Fitrah so long as they do not delay the Maghrib until the stars have come out." (Hasan)Abu 'Abdullah bin Majah said: I heard Muhammed bin Yahya saying: 'The people in Baghdad were confused in narrating this Hadith. Abu Bakr Al-A'yan and I went to 'Awwam bin 'Abbad bin 'Awwam and he brought out to us the book of his father, and this Hadith was in it.'"  

قَالَ رَسُولُ اللَّهِ ﷺ لاَ تَزَالُ أُمَّتِي عَلَى الْفِطْرَةِ مَا لَمْ يُؤَخِّرُوا الْمَغْرِبَ حَتَّى تَشْتَبِكَ النُّجُومُ قَالَ أَبُو عَبْدِ اللَّهِ بْنُ مَاجَهْ سَمِعْتُ مُحَمَّدَ بْنَ يَحْيَى يَقُولُ اضْطَرَبَ النَّاسُ فِي هَذَا الْحَدِيثِ بِبَغْدَادَ فَذَهَبْتُ أَنَا وَأَبُو بَكْرٍ الأَعْيَنُ إِلَى الْعَوَّامِ بْنِ عَبَّادِ بْنِ الْعَوَّامِ فَأَخْرَجَ إِلَيْنَا أَصْلَ أَبِيهِ فَإِذَا الْحَدِيثُ فِيهِ