From Sahih Muslim (Hadith 951):
Sahl b. Sa'd al-Sa'idi reported:The Apostle of Allah (ﷺ) went to Bani Amr b. 'Auf in order to bring about reconciliation amongst them. The rest of the hadith is the same but with (the addition of these words):" The Messenger of Allah (ﷺ) came and made his way through the rows till he came to the first row and Abu Bakr retraced his steps
Reference: Muslim 951