I am particularly looking for the grammatical explanation of the "hath ending" in the last line of the following stanza, why it's not "the world is ending"? Or if I say it means that "world has its ending with your life", would it be correct?
"Thrice fairer than myself," thus she began,
"The field's chief flower, sweet above compare,
Stain to all nymphs, more lovely than a man,
More white and red than doves or roses are.
Nature that made thee with herself at strife.
Saith that the world hath ending with thy life.
Venus and Adonis by William Shakespeare