The right of private defence of the body commences as soon as a reasonable apprehension of danger to the body arises from an attempt or threat to commit the offence though the offence may not have been committed; and it continues as long as such apprehension of danger to the body continues.
Home The Bharatiya Nyaya Sanhita (BNS), 2023 Section 40. Commencement and continuance of right of private defence of body.