Wiktionary
vb. (obsolete spelling of swear English)
Usage examples of "sweare".
And therewithall shee willed secretly the residue to depart : who being gone she sayd, My most deare Cousin Lucius, I do sweare by the goddesse Diana, that I doe greatly tender your safety, and am as carefull for you as if you were myne owne naturall childe, beware I say, beware of the evil arts and wicked allurements of that Pamphiles who is the wife of Milo, whom you call your Host, for she is accounted the most chief and principall Magitian and Enchantresse living, who by breathing out certain words and charmes over bowes, stones and other frivolous things, can throw down all the powers of the heavens into the deep bottome of hell, and reduce all the whole world againe to the old Chaos.
For I dare sweare by the love that I beare unto you, and I will not be perswaded, though you your selfe should endeavour the same, that ever you went to trouble or harm me : perhaps sometimes you imagined an evil thought in your mind, which afterwards you revoked, but that is not to bee deemed as a crime.
To whom he answered Certes sir I thank you for your gentle offer, and at your request I wil proceed in my tale, but first I will sweare unto you by the light of this Sunne that shineth here, that those things shall be true, least when you come to the next city called Thessaly, you should doubt any thing of that which is rife in the mouthes of every person, and done before the face of all men.
And he shall sweare to you, and that blife,* *quickly He shall no more aguilten* in this wise, *offend But shall maken, as ye will him devise, Of women true in loving all their life, Whereso ye will, of maiden or of wife, And further you as much as he missaid Or* in the Rose, or elles in Cresseide.
As where a Law exacteth a Pecuniary mulct, of them that take the name of God in vaine, the payment of the mulct, is not the price of a dispensation to sweare, but the Punishment of the transgression of a Law indispensable.