pilgrim with<unk>  bump photographed outside Masjid al-Haram. A<unk> , zabiba or zebiba ( zabība, "raisin") is a callus on the forehead present in some devout praying Muslims, mainly in Egypt. Owing to its societal significance it is also known as the "devout sign". Among notable Egyptian leaders Anwar Sadat's reputation for personal piety was evidenced by a callus on his forehead from repeated prostration in<unk> . Islam requires its adherents to pray five times a day (known as salat), which involves kneeling on a<unk>  mat and touching the ground (or a raised piece of clay called turbah by the Shia) with one's forehead. When done firmly for extended periods of time, a callus – the<unk>  bump" – can develop on the foreheadwhich may be considered as a sign of piety and dedication. It is mentioned in the Quran as: Some Muslims also believe that on the Day of Resurrection, this callus will fluoresce with an immense white light. However, riya (showing-off) is prohibited in Islam; if the<unk>  bump may result in riya, it is recommended to take precautionary measures to stop a bump forming, as worship may be deemed void due to riya. In extreme cases, the callus can be thick enough to create a noticeable bump that protrudes from the forehead.
Prayer callus
Skin bridge
Synchysis scintillans
Hair whorl
Ingrown hair
Fracture blister
Pincer nail
Fibrocartilage callus