Wiktionary
vb. (context archaic English) (en-third-person singular of: believe)
Usage examples of "believeth".
He swalloweth the ground with fierceness and rage, neither believeth he that it is the sound of the trumpet.
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
Oh, shall I ever learn the sweet charity that thinketh no evil, and believeth all things?
God so loved the world that He gave His only be gotten son, that whosoever believeth in Him, should not perish, but have everlasting life.
I am the resurrection, and the life: he that believeth in me, though he were dead, yet shall he live: And whosoever liveth and believeth in me shall never die.
Lord: he that believeth in me, though he were dead, yet shall he live.