'Shedding' in the Bible

When Abner returned to Hebron, Joab brought him aside within the gateway to talk to him alone and then stabbed him in the abdomen. So he died for shedding the blood of Joab's brother Asahel.

How much worse will it be, then, when evil men kill an innocent man on his own bed in his own house! Shouldn't I avenge his blood which you are responsible for shedding by removing you from the earth?"

But Amasa [who had replaced Joab as David’s commander] was off guard and not attentive to the sword in Joab’s hand. So Joab struck Amasa in the abdomen with the sword, spilling his intestines to the ground. Without another blow Amasa died. Then Joab and Abishai his brother pursued Sheba the son of Bichri.