Masjid al-Sajdah (Abu Dharr)

It is narrated that the Prophet (PBUH) performed a very long prostration (Sajdah) here after receiving the glad tidings from Jibreel (AS) that whoever sends salutations upon him, Allah will send salutations upon them ten times. It is also known as Masjid al-Shukr (Mosque of Gratitude).