وقال حبيب بن ربيع القروي مذهب مالك وأصحابه أن من قال فيه ﷺ ما فيه نقص قتل دون استتابةٍ وقال إبن عتاب الكتاب والسنة موجبان أنّ من قصد النبي ﷺ بأذى أو نقص معرضاً أو مصرّحاً وإن قلّ فقتله واجب
الشفا للقاضي عياض اليحصبي القسم الرابع في تصرف وجوه الأحكام فيمن تنقّصه أو سبّه عليه الصلاة والسلام الباب الأول في بيان ما هو في حقه ﷺ سب أو نقص من تعريض أو نص
Habib ibn Rabi’ Al-Qawari said: The doctrine of Malik and his companions is that whoever says anything of Him (SAW) in which there is any slighting, is to be killed without seeking his repentance. Ibn ‘Attab said: The Book and the sunnah both make it obligatory that whoever intends to harm or slight the Prophet (SAW), insinuating or openly, even just a little, must be killed.
Al-qadi ‘Iyad Al-Yahsubi, Al-shifa bi Ta'rif Huquq Al-Mustafa [The Book of Healing by Making Known the Rights of the Chosen One], Part Four: regarding disposition of the aspects of legal rulings for those who slander Him or insult Him (prayers and peace be upon him), Chapter One: Declaration of what is in His (SAW) right in being slandered or slighted, either insinuated or openly