'Saith' in the Bible

Go and tell my servant David, Thus saith the LORD, Shalt thou build me an house for me to dwell in?

Now therefore so shalt thou say unto my servant David, Thus saith the LORD of hosts, I took thee from the sheepcote, from following the sheep, to be ruler over my people, over Israel:

And Nathan said to David, Thou art the man. Thus saith the LORD God of Israel, I anointed thee king over Israel, and I delivered thee out of the hand of Saul;

Thus saith the LORD, Behold, I will raise up evil against thee out of thine own house, and I will take thy wives before thine eyes, and give them unto thy neighbour, and he shall lie with thy wives in the sight of this sun.

And the king said, Whosoever saith ought unto thee, bring him to me, and he shall not touch thee any more.

Then said Absalom, Call now Hushai the Archite also, and let us hear likewise what he saith.

Go and say unto David, Thus saith the LORD, I offer thee three things; choose thee one of them, that I may do it unto thee.