The Messenger of Allah ﷺ said, "Whoever kills a person under a covenant of protection without just cause will not catch the scent of Paradise, though its fragrance can be detected from a distance of a hundred years' travel."
قال رسول الله ﷺ: من قتل نفسا معاهدة بغير حقها لم يرح رائحة الجنة، وإن ريح الجنة توجد من مسيرة مائة عام.
Tabarani related it in Awsat — Majma Bahrayn (2491–2492) through routes from Isa bin Yunus, from Awf Arabi, from Muhammad bin Sirin, from Abu Hurairah, and he mentioned it. Its chain is sahih.Diya said in Mukhtarah, "In my view, its chain meets the standard of sahih."