Ablution (Wazu) is the act of purification before performing Salah (prayer). It was made obligatory in the 5th year after Hijrah (5 A.H.). This command was revealed to the Prophet Muhammad (PBUH) through the Holy Qur’an.

The purpose of Wazu is both physical and spiritual cleanliness. Islam emphasizes cleanliness as half of faith, and ablution is a practical way to stay clean and prepare the heart and body for prayer.

Wazu must be done before every obligatory prayer if a person is not already in a state of purity. It also needs to be repeated if it is broken due to certain actions like sleeping, using the restroom, etc.

This practice also reflects discipline and devotion in the life of a Muslim. Performing Wazu regularly helps maintain hygiene and builds a habit of mindfulness before standing in front of Allah.

Thus, the command to make Wazu obligatory was revealed in 5 A.H. to ensure proper preparation for prayer.