en_tn/1sa/19/05.md

he took his life in his hand

Here "life in his hand" is an idiom that refers to risking his life. AT: "he risked his life" (See: rc://en/ta/man/translate/figs-idiom)

Why would you sin against innocent blood by killing David for no reason?

Jonathan asks this question to rebuke Saul. This rhetorical question can be translated as a statement. AT: "You should not sin against innocent blood and kill David without cause." (See: rc://en/ta/man/translate/figs-rquestion)

sin against innocent blood

Here "blood" is a metonym for the life of an innocent person. AT: "commit the sin of murder" (See: rc://en/ta/man/translate/figs-metonymy)