The Pillars of Wudu (Ablution) are the essential parts that must be performed during wudu. If one of them is left out, the wudu is invalid. There are six main pillars:

1. Intention (Niyyah)
Making the intention in the heart to perform wudu for the sake of Allah. It does not need to be spoken aloud, only in the heart.

2. Washing the Face
Washing the entire face, from the hairline on the forehead to the chin, and from the right ear to the left ear.

3. Washing Both Hands up to the Elbows
Washing the right and left hands up to the elbows, ensuring the elbows are included.

4. Wiping Part of the Head
At minimum, wiping a portion of the hair on the head with water. It is better to wipe the entire head.

5. Washing Both Feet up to the Ankles
Washing the right and left feet up to the ankles.

6. Order (Tartib)
Performing the pillars of wudu in the correct sequence as taught.