'Says the Lord' in the Bible

“Go and tell My servant David, ‘Thus says the Lord, “Should you be the one to build Me a house in which to dwell?

So now, say this to My servant David, ‘Thus says the Lord of hosts, “I took you from the pasture, from following the sheep, to be ruler over My people Israel.

Then Nathan said to David, “You are the man! Thus says the Lord, the God of Israel, ‘I anointed you as king over Israel, and I spared you from the hand of Saul.

Thus says the Lord, ‘Behold, I will stir up evil against you from your own household; and I will take your wives before your eyes and give them to your companion, and he will lie with your wives in broad daylight.

“Go and say to David, ‘Thus says the Lord, “I am giving you three choices; select one of them for yourself, and I will do it to you.”’”