The Book of Asceticism · Hadith 26 (#Ḥadīth #23)
Chapter 1 | On silence Except when Speaking what is Good, Abandonment of what does not concern one, and Slander
فضالة عن عبد الله بن بكير عن أبي بصير عن أبي جعفر عليه السلام قال: كان رسول الله صلى الله عليه وآله يقول في خطبته سباب المؤمن فسق وقتاله كفر واكل ماله معصية وحرمة ماله كحرمة دمه.
23.Faḍālah narrated from ʿAbdullāh ibn Bukayr, from Abū Baṣīr, from Abū Jaʿfar who said, “The Messenger of Allah (ṣ) used to say in his sermon, ‘Cursing a believer is transgression and fighting him is disbelief. Consuming his property [without permission] is a sin and his property is as inviolable as his blood.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).