Must express this saying, There is no god but God and Muhammad is the prophet of God.
It represents acceptance not only of Allah and his prophet, but of the entirety of Islam.il
As one of the Pillars, the shahada must be recited correctly aloud with full understanding and internal assent at least once in every Muslim's lifetime.
At least once in his or her lifetime, each Muslim is expected to undertake a pilgrimage to Mecca, the sacred city of Islam.
While a visit to Mecca is beneficial any time of the year, it must take place during the month of Dhu al-Hijja (the last month of the Islamic year) to fulfill the requirements of the hajj.