Perform ablution or wudu before engaging in any religious activity .

According to a hadith narrated by 'Ali ibn Abi Talib, the Prophet Muhammad performed ablution or wudoo before performing his prayers and other religious activities. This ritual involves washing each part of the body three times with water, starting from the right side and then moving to the left side. This is done in order to purify oneself spiritually and physically before engaging in any religious activity. It is also a way for Muslims to remember that they are servants of Allah and must always strive for purity in their thoughts, words, and deeds.