Who are the servants of the Messenger of Allah, peace and blessings be upon him?

A number of companions served the Prophet, may Allah bless him and grant him peace, among them: Anas ibn Malik, Abdullah ibn Mas'ud, Uqbah ibn Amir al-Juhani, Aslam ibn Sharik, Bilal ibn Rabah, Sa'd the freed slave of Abu Bakr al-Siddiq, Abu Dharr al-Ghifari, and Ayman ibn Ubayd.