Sunan an-Nasa'i al-Kubra 8049
ʿAbd al-Malik b. ʿAbd al-Ḥamīd > al-Qaʿnabī > Mālik > Abū al-Naḍr > ʿUbayd b. Ḥunayn > Abū Saʿīd al-Khudrī
The Messenger of Allah ﷺ said, "Indeed, the most trustworthy among the people in my company and with regards to their wealth is Abu Bakr. If I were to take a close friend, I would have taken Abu Bakr as a friend. However, we are brothers in Islam. There is not a single khawfah (green stalk) in the masjid except it is the khawfah of Abu Bakr."
أَخْبَرَنَا عَبْدُ الْمَلِكِ بْنُ عَبْدِ الْحَمِيدِ قَالَ أَخْبَرَنَا الْقَعْنَبِيُّ عَنْ مَالِكٍ عَنْ أَبِي النَّضْرِ عَنْ عُبَيْدِ بْنِ حُنَيْنٍ عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ قَالَ
قَالَ رَسُولُ اللهِ ﷺ «إِنَّ أَمَنَّ النَّاسِ عَلَيَّ فِي صُحْبَتِهِ وَمَالِهِ أَبُو بَكْرٍ وَلَوْ كُنْتُ مُتَّخِذًا خَلِيلًا لَاتَّخَذْتُ أَبَا بَكْرٍ خَلِيلًا وَلَكِنْ أُخُوَّةُ الْإِسْلَامِ وَلَا يَبْقَيَنَّ فِي الْمَسْجِدِ خَوْخَةٌ إِلَّا خَوْخَةَ أَبِي بَكْرٍ»