'Behold' in the Bible

Then all Israel gathered to David at Hebron, saying, “Behold, we are your bone and your flesh.

As David sat in his house (palace), he said to Nathan the prophet, “Behold, I live in a house of cedars, while the ark of the covenant of the Lord is under tent curtains.”

Behold, a son will be born to you, who will be a man of peace. I will give him rest from all his enemies on every side; for his name shall be Solomon, and I will give peace and quiet to Israel in his days.