'Addeth' in the Bible

And Jehovah addeth to speak unto Ahaz, saying:

And Jehovah addeth to speak unto me again, saying:

And it hath come to pass, in that day, The Lord addeth a second time his power, To get the remnant of His people that is left, From Asshur, and from Egypt, And from Pathros, and from Cush, And from Elam, and from Shinar, And from Hamath, and from isles of the sea,

Stagger greatly doth the land as a drunkard, And it hath been moved as a lodge, And heavy on it hath been its transgression, And it hath fallen, and addeth not to rise.