'Here's' in the Bible

Why did you say, ‘She’s my sister,’ so that I took her as my wife? Now, here is your wife. Take her and go!”

They brought Ish-bosheth’s head to David at Hebron and said to the king, “Here’s the head of Ish-bosheth son of Saul, your enemy who intended to take your life. Today the Lord has granted vengeance to my lord the king against Saul and his offspring.”

“In the middle of the night there was a shout: ‘Here’s the groom! Come out to meet him.’