Says vs Saith - What's the difference?

As a verb says

is (say).

*saith, sayeth (archaic)

(head)

(say)

* English plurals

* sayeth * says (modernly used form)

(head)

(archaic) (say)

* 1611 , The Bible'', ''Authorized Version , Exodus 8.i

And the LORD spake unto Moses, Go unto Pharaoh, and say unto him, Thus saith the LORD, Let my people go, that they may serve me.

*, B. Blake (1836), p.663

In this life we have but a glimpse of this beauty and happiness; we shall hereafter, as John saith , see him as he is.

* 1850 , (Dante Gabriel Rossetti), (The Blessed Damozel) , lines 89-90:

While every leaf that His plumes touch / Saith His Name audibly.

* *

(en noun)

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