Final answer:
The phrase 'There is no god but Allah and Muhammad (pbuh) is his prophet is known as the shahada in Islam, which is a declaration of faith and the first of the Five Pillars of Islam.
Step-by-step explanation:
The statement "There is no god but Allah and Muhammad (pbuh) is his prophet" is known in Islam as the shahada, which is the declaration of faith.
This creed is foundational to Islam and is the first of the Five Pillars, which are central to a Muslim's faith and practices.
Believing in the oneness of Allah (God) and the prophethood of Muhammad (pbuh) is paramount to the Islamic faith, and the shahada is a testimony that affirms this belief.
It is recited by Muslims daily and is a key component in the conversion to Islam.
The hijra, on the other hand, refers to Muhammad (pbuh)'s migration from Mecca to Medina, which is another significant event in Islamic history that marks the beginning of the Islamic calendar.