He came to Abdullah and said, "There is no grudge between me and anyone among the Arabs, but I passed by a mosque belonging to Banu Hanifa and found them professing belief in Musaylima."So Abdullah sent for them, and they were brought before him. He called on them to repent, and they did, except for Ibn al-Nawwaha. Abdullah said to him, "I heard the Messenger of Allah ﷺ say, 'Were it not that you are an envoy, I would strike off your neck.' Today you are not an envoy."He then ordered Qarada bin Kaab, who struck off his neck in the marketplace. Abdullah then announced, "Whoever wishes to see Ibn al-Nawwaha, he lies slain in the marketplace."
أنه أتى عبد الله فقال: ما بيني وبين أحد من العرب حنة، وإني مررت بمسجد لبني حنيفة، فإذا هم يؤمنون بمسيلمة. فأرسل إليهم عبد الله، فجيء بهم فاستتابهم غير ابن النواحة، قال له: سمعت رسول الله ﷺ يقول: لولا أنك رسول لضربت عنقك. فأنت اليوم لست برسول، فأمر قرظة بن كعب فضرب عنقه في السوق، ثم قال: من أراد أن ينظر إلى ابن النواحة قتيلا بالسوق.
Abu Dawud (2762) and Ibn Hibban (4879) both narrated it through Muhammad bin Kathir Abdi, who said, Sufyan Thawri told us, from Abu Ishaq, from Haritha bin Mudarrib, who said, and then he related it. Its isnad is sahih, and Sufyan Thawri heard from Abu Ishaq before his confusion set in. The hadith has other routes as well.As for his saying "hinnah," in Sahih Ibn Hibban it appears as "ihnah" with the hamzah, which is the more eloquent form, and it means rancor.