Al-Baladhari:
Narrated Khalaf from Abdul-Warith ibn Sa'eed ibn Jumhan from Safina, the servant of Umm Salama (s.a), who said: The Prophet (saw) was sitting when Aboo Sufyan passed by on a camel, accompanied by Mu'awiyah and his brother, one of them was leading the camel and one of them was following from behind. Then the Messenger of Allah (saw) said: "May Allah (swt) curse the rider, the leader and the follower."
Alkarbala