It is narrated from Sayyiduna Usamah bin Zayd (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Do not become disbelievers after me, striking one another's necks."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Sufyan al-Thawri except Yahya bin Abi Bukayr, and Isa bin Abi Harb is alone in narrating it."