'Saith' in the Bible

Go and say to my servant, to David, Thus saith Jehovah: Wilt thou build me a house for me to dwell in?

And now, thus shalt thou say unto my servant David, Thus saith Jehovah of hosts: I took thee from the pasture-grounds, from following the sheep, to be prince over my people, over Israel;

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

Thus saith Jehovah: 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.

Now these are the last words of David: David the son of Jesse saith, And the man who was raised up on high, The anointed of the God of Jacob, And the sweet psalmist of Israel saith,

Go and say to David, Thus saith Jehovah: I impose on thee three things; choose one of them that I may do it unto thee.