Abu Sa'id reported there was some altercation between Khalid b. Walid and Abd al-Rahman b. 'Auf and Khalid reviled him. Thereupon Allah's Messwger (ﷺ) said: None should revile my Companions. for if one amongst you were to spend as much gold as Uhud, it would not amount to as much as one mudd of one of them or half of it.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا جَرِيرٌ، عَنِ الأَعْمَشِ، عَنْ أَبِي صَالِحٍ، عَنْ أَبِي، سَعِيدٍ قَالَ كَانَ بَيْنَ خَالِدِ بْنِ الْوَلِيدِ وَبَيْنَ عَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ شَىْءٌ فَسَبَّهُ خَالِدٌ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لاَ تَسُبُّوا أَحَدًا مِنْ أَصْحَابِي فَإِنَّ أَحَدَكُمْ لَوْ أَنْفَقَ مِثْلَ أُحُدٍ ذَهَبًا مَا أَدْرَكَ مُدَّ أَحَدِهِمْ وَلاَ نَصِيفَهُ " .
sunnah.com