Bhagavad Gita

ಯ ಏನಂ ವೇತ್ತಿ ಹಂತಾರಂ ಯಶ್ಚೈನಂ ಮನ್ಯತೇ ಹತಮ್ ।
ಉಭೌ ತೌ ನ ವಿಜಾನೀತೋ ನಾಯಂ ಹಂತಿ ನ ಹನ್ಯತೇ ॥೧೯॥
ya enaṃ vetti haṃtāraṃ yaścainaṃ manyate hatam |
ubhau tau na vijānīto nāyaṃ haṃti na hanyate ||19||

Gist of the sloka:
Who thinks that person murdered another and other got murdered are both ignorant. One cannot kill or get killed.
Those who believe that a person was murdered/murderer or the being was destroyed does not have real knowledge. No wise men believe so.
The reason being, soul cannot be murdered nor can be killed. What we see as being murdered or destroyed is the gross body not the soul.
Even the soul residing in the body does not have the freedom to die or get murdered. Every event in the universe happens because Lord wishes so and not because of individual soul’s intent.
The reason Lord explains this aspect is because Arjuna thinks he can kill Kauravas in the battle. Without Lord’s will, nothing happens in the universe irrespective of soul intending to do so.