Definition of "foison"

The earth did never mean her foizonFor those who crown life’s cup with poisonOf fanatic rage and meaningless revenge—But for those radiant spirits, who are stillThe standard-bearers in the van of Change.

1820, Percy Bysshe Shelley, Oedipus Tyrannus; Or, Swellfoot The Tyrant: A Tragedy in Two Acts

Gon. […] Treaſon, fellony, / Sword, Pike, Knife, Gun, or neede of any Engine / Would I not haue : but Nature ſhould bring forth / Of it owne kinde, all foyzon, all abundance / To feed my innocent people.

1610–1611 (date written), William Shakespeare, “The Tempest”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act II, scene i], page 7