John Wesley on Exodus 20:13

Thou shalt not kill - Thou shalt not do any thing hurtful to the health, or life of thy own body, or any other's. This doth not forbid our own necessary defence, or the magistrates putting offenders to death; but it forbids all malice and hatred to any, for he that hateth his brother is a murderer, and all revenge arising therefrom; likewise anger and hurt said or done, or aimed to be done in a passion; of this our Saviour expounds this commandment, Mt 5:22.