Narrated Aisha
Once Allah's Messenger (ﷺ) heard the loud voices of some opponents quarreling at the door. One of them was appealing to the other to deduct his debt and asking him to be lenient but the other was saying, "By Allah I will not do so." Allah's Messenger (ﷺ) went out to them and said, "Who is the one who was swearing by Allah that he would not do a favor?" That man said, "I am that person, O Allah's Messenger (ﷺ)! I will give my opponent whatever he wishes."
Narrated `Abdullah bin Ka`b bin Malik from Ka`b bin Malik
`Abdullah bin Abu Hadrad Al-Aslami owed Ka`b bin Malik some money. One day the latter met the former and demanded his right, and their voices grew very loud. The Prophet (ﷺ) passed by them and said, "O Ka`b," beckoning with his hand as if intending to say, "Deduct half the debts." So, Ka`b took half what the other owed him and remitted the other half.