The Shahada, also spelled shahadah, (Arabic: الشهادةaš-šahādaaudio (help·info) from the verb šahida "to testify") is the Islamiccreed. The Shahada is the Muslimdeclaration of belief in the oneness of God and acceptance of Muhammad as his prophet. The declaration reads: Lā ilaha illa al-Lāh, Muhammadun rasūlu l-Lāh “There is no god but God, Muhammad is the Messenger of God" in English. This declaration is called the Kalima, which literally means "words." Recitation of the Shahadah is the most important of the Five Pillars of Islam for Muslims and is performed daily. Non-Muslims wishing to convert to Islam do so by a public recitation of the creed. Technically the Shi'a do not consider the Shahadah to be a separate pillar, but connect it to the beliefs.
One of the earliest surviving translations of the Shahadah into a foreign language is in Greek, from the reign of al-Walid I (86–96 AH, 705–715 CE): Οὐκ ἔστι[ν θεὸς εἰ μὴ ὁ θεὸς μόνος·] Μααμὲ[τ ἀπόστολος θεοῦ] (Ouk esti[n theos ei mē ho theos monos;] Maame[t apostolos theou]). "There is no god except for God alone; Muhammad is God's apostle"; i.e. "Allah" is translated as ὁ θεὸς and Muhammad is transliterated as Μααμὲτ.
The Shahada is the first of the Six Kalimas. The Six Kalimas are recorded in various books of knowledge, and are recited and remembered by Muslims across the globe. The Kalimas were compiled for people to memorise and learn the basic fundamentals of Islam.
Muslims believe reference to previous prophets as Messengers (rasul), and a few groups (notably certain Sufi mystics) amend the declaration to mention prior prophets whose names are found in the Qur'an.
Sometimes اشهد ان 'ashhadu ‘an = "I witness that" is prefixed to each half of the Shahadah.
Sometimes و wa = "and" is prefixed to the first word of the second half of the Shahada.
Some Indonesian Muslims pray "Allah il Allah" when appealing for God's help. This is an altered form of the first part of the Shahadah.
Some Shī‘ī Muslims add "and Ali is the wali of God" (wa-‘Aliyun waliyu l-Lāh), but this is not obligatory.