Yajurveda 13.4 [exclusive] -

But even here, the context is , not literal murder. In Vedic ritualism, every object—the post ( yūpa ), the altar ( vedi ), the grass ( barhis )—is metaphorically said to “slay” the sins or the evil forces. This is apotropaic magic : declaring an object to be the "slayer" of enemies or obstacles is a formula for protection, not a call to kill humans.