Ya Muhammad () is an Arabic expression invoking Muhammad.
The phrase means "O Muhammad". The word yÃÂ indicates the vocative case, signifying direct address to a person. It is a common prefix used by Arabic speakers before personal names.
It is used to seek intercession through the prophet or his family, companions and venerated figures. The majority of its practitioners are the Shias and Sunnis including the Sufis. The vocative yÃÂ when used with AllÃÂh is used to call upon God for help.
During the mourning of Muharram, spontaneous slogans of Ya Husayn, Ya Ali, and Ya Rasul Allah ( "O Messenger of God") are common by Shias. On such occasions, the slogans demonstrate support.