The concept of ahiṃsā forms the base of Buddhism. In Buddhism, the first of the five basic vows ("precepts") that are undertaken voluntarily by those who practice, is "I undertake the training rule to abstain from killing". In Buddhism, killing any living being out of passion is considered 'hiṃsā' (injury) and abstaining from such act is 'ahiṃsā' (non-injury or nonviolence).