Musnad Ahmad 430:17

Yunus narrated to us, he said: Ibrahim, meaning Ibn Sa'd, narrated to us, from 'Ubaydah ibn Abi Ra'itah, from 'Abdullah ibn 'Abd al-Rahman, from 'Abdullah ibn Mughaffal al-Muzani, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Do not take my companions as a target after me. Whoever loves them, then by my love he loves them; and whoever hates them, then by my hatred he hates them. Whoever harms them has harmed me, and whoever harms me has harmed Allah, and whoever harms Allah, it is imminent that He will seize him."