To perform Ghusl, the ritual purification in Islam, one must follow certain rules:

1. **Intention (Niyyah)**: Have the intention of performing Ghusl for purification.

2. **Start with Bismillah**: Begin by saying “Bismillah” (In the name of Allah).

3. **Wash Hands**: Wash hands thoroughly, ensuring that no part is left dry.

4. **Wash Private Parts**: Cleanse the private parts to remove impurities.

5. **Perform Wudu**: Complete the steps of Wudu (ablution), washing the face, arms, head, and feet.

6. **Pour Water Over Entire Body**: Ensure that water reaches every part of the body, including the hair and skin. It’s essential to perform Ghusl in a way that water reaches the roots of the hair.

7. **Sequence of Washing**: Start by washing the head and neck, then the right side of the body, followed by the left side.

8. **Ensure Water Reaches Skin**: Make sure water reaches the skin and flows over the entire body, ensuring thorough purification.

9. **Avoid Talking During Ghusl**: Maintain focus and avoid unnecessary conversation during the process.

10. **Completion**: Once the entire body has been washed, make a dua (supplication) for forgiveness and ask for blessings.

By following these rules and steps, one can perform Ghusl correctly for ritual purification in accordance with Islamic teachings.