The Book of the Etiquette of Judges

It was narrated from Ka'b bin Malik that:

He owed a debt by 'Abdullah bin Abi Hadrad Al-Aslami. He met him, and asked him to pay it off. They exchanged words until their voices became loud. The Messenger of Allah [ﷺ] passed by them and said: "O Ka'b!" and he gestured with his hand to say half. So he took half of what was owed and let him off the other half.