Along with the maintenance of the Five K's, the Khalsa is required to refrain from committing the four taboos or Kurehats. These are:

1. Trimming, shaving or removing hair from the body.

2. Using tobacco or intoxicants in any form.

3. Eating of kosher or halal meat any food "purified" ritually.

4. Committing adultery.

A Sikh guilty of committing any of these serious breaches is regarded as the fallen one (Patit or Tankhahiya). Guru Gobind Singh declared that as long as the Khalsa remained true to the Five K's and the Sikh code of discipline, it will win glory, but if the Khalsa showed indifference, its progress would be hampered.