The same narration is reported from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both), however, in it are these words: That man said: The other day, this woman began to speak ill of you and showed disrespect towards you, so I killed her. The Noble Prophet (peace and blessings be upon him) said: "Bear witness, all of you, that the blood of this woman is wasted." Imam Daraqutni has stated that from this, the Sunnah is established that while passing a judgment, a ruler may make people witnesses regarding his own self.
Hadith Referenceسنن الدارقطني / كتاب فى الأقضية والأحكام وغير ذلك / 4505
Hadith Takhrij«أخرجه الضياء المقدسي فى "الأحاديث المختارة"، 177، 178، والحاكم فى ((مستدركه)) برقم: 8136، والنسائي فى ((المجتبیٰ)) برقم: 4075 ، والنسائي فى ((الكبریٰ)) برقم: 3519، وأبو داود فى ((سننه)) برقم: 4361، والدارقطني فى ((سننه)) برقم: 3194، 3195، 4503، 4504، 4505، والطبراني فى((الكبير)) برقم: 11984»