It is also related in al-Tirmidhī and the Sunan of Abū Dāwūd from Umar—may Allah be pleased with him—who said:
“The Messenger of Allah—may Allah bless him and grant him peace—commanded us (1) to give in charity. It so happened (2) that I had some wealth, so I said, ‘Today I will outdo Abū Bakr, if ever I can outdo him.’ I brought half of my wealth, and the Prophet—may Allah bless him and grant him peace—asked, ‘What have you left for your family?’ I replied, ‘The same amount.’ Abū Bakr, however, brought everything he had. The Prophet asked, ‘Abū Bakr, what have you left for your family?’ He replied, ‘Allah and His Messenger.’ I said, ‘I will never try to outdo him in anything again.’” (3).
In al-Bukhārī, it is related from Abū al-Dardā, who said:
“I was sitting with the Prophet—may Allah bless him and grant him peace—when Abū Bakr approached, clutching the hem of his garment and holding it up until his knee was exposed (4). The Prophet—may Allah bless him and grant him peace—said, ‘Your companion has become embroiled in a quarrel.’ Abū Bakr then greeted him and said, ‘There was (5) a disagreement between Ibn al-Khattāb and me, and I acted rashly toward him. Then I regretted it and asked him to forgive me, but he refused, so I came to you.’ He replied three times, ‘May Allah forgive you, Abū Bakr.’ Then Umar regretted what he had done, went to Abū Bakr’s home, and asked (6), ‘Is Abū Bakr here?’ They replied, ‘No.’ He then went to the Prophet—may Allah bless him and grant him peace—[and greeted him] (7), whereupon the face of the Prophet—may Allah bless him and grant him peace—began to change. Abū Bakr grew apprehensive, dropped to his knees, and said: