Ubay bin Ka’b Mosque is located to the east of the Prophet’s Mosque near Al-Baqi’, and it is to the right of the outside of Darb Al-Baqi’ (Darb Al-Jumu’ah). It is in Al-Baqi’, which is a disheveled mat, and the Messenger, may God bless him and grant him peace, prayed more than twice, as well as in the site of the Prophet’s supplication, may God’s prayers and peace be upon him, for the people of al-Baqi’ and he asked forgiveness for them, and it was removed, and it is now inside the wall of al-Baqi’.