'Shed Blood' in the Bible

Now therefore, my lord, as the LORD liveth, and as thy soul liveth, seeing the LORD hath withheld thee from coming to shed blood, and from avenging thyself with thy own hand, now let thy enemies, and they that seek evil to my lord, be as Nabal.

That this shall be no grief unto thee, nor offence of heart unto my lord, either that thou hast shed blood causeless, or that my lord hath avenged himself: but when the LORD shall have dealt well with my lord, then remember thine handmaid.

And blessed be thy advice, and blessed be thou, who hast kept me this day from coming to shed blood, and from avenging myself with my own hand.