Dhikr is a form of Islamic worship in which phrases or prayers are repeatedly recited for the purpose of remembering God. It plays a central role in Sufism, and each Sufi order typically adopts a specific dhikr, accompanied by specific posture, breathing, and movement. In Sufism, dhikr refers to both the act of this remembrance as well as the prayers used in these acts of remembrance. Dhikr usually includes the names of God or supplication from the Quran or hadith. It may be counted with either one's fingers or prayer beads, and may be performed alone or with a collective group. A person who recites dhikr is called a dhākir.
An example of a Tasbih that Muslims use to track their count for dhikr.
A group of Iranian Maddahs/Dhakirs, in a gathering
Allah is the common Arabic word for God. In the English language, the word generally refers to God in Islam. The word is thought to be derived by contraction from al-ilāh, which means "the god", and is linguistically related to the Aramaic words Elah and Syriac ܐܲܠܵܗܵܐ (ʼAlāhā) and the Hebrew word El (Elohim) for God.
Usesage of the name in the pre-Islamic or early Islamic period; Rashidun caliphs used the Sassanids symbols (Star and crescent, fire temple, the picture of the last emperor Khosrau II) by adding the phrase Besmela on their coins, instead of designing a new one.
Medallion showing "Allah Jalla Jalaluhu" in the Hagia Sophia, Istanbul, Turkey
Allah script outside the Old Mosque in Edirne, Turkey
Silk textile panel repeating the name Allah, North Africa, 18th century