The Messenger of Allah ﷺ said, "Whoever comes out seeking to divide my ummah, strike off his neck."
أخبرنا محمد بن قدامة قال حدثنا جرير عن زيد بن عطاء بن السائب عن زياد بن علاقة
قال رسول الله ﷺ أيما رجل خرج يفرق بين أمتي فاضربوا عنقه
No references are available.
Sourcing, its isnad is hasan. Tabarani transmitted it in Al-Kabir, 1/186, no. 487, from the hadith of Jareer bin Abdul-Hameed, and it is also in Al-Kubra, no. 3486. It has corroborating narrations, including the preceding hadith.Zayd bin Ataa was deemed trustworthy by Tirmidhi and Ibn Hibban, and he is hasan al-hadith.