What is the explanation of Abu Darda's hadith in Sahih Al-Bukhari, which mentions Abu Bakr's arrival to the Prophet, peace and blessings be upon him, after a dispute with Umar, and the Prophet's saying: "As for your companion, he has contended," then Umar regretted and followed him, and the Prophet's face changed color, and his saying: "Indeed, Allah sent me to you, and you said: You lied, and Abu Bakr said: He spoke the truth, and he supported me with his self and his wealth, so will you leave my companion alone twice?"

The hadith narrates a story of a disagreement between Abu Bakr and Umar, may Allah be pleased with them both, where Umar angered Abu Bakr. Abu Bakr apologized, but Umar did not accept. So, Abu Bakr quickly went to the Prophet, peace be upon him, who prayed for his forgiveness. Umar regretted it and followed them. Abu Bakr feared that the Prophet, peace be upon him, would be angry with Umar, so he knelt down and admitted that he was the one who was unjust. The Prophet, peace be upon him, then praised Abu Bakr for his virtue and companionship, and forbade harming him. Among the benefits of this hadith are the فضائل (virtues) of Abu Bakr, the permissibility of praising a person to their face, that no one other than the Prophet is infallible, and the desirability of seeking forgiveness from the one you have wronged.