swear upon
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English
[edit]Alternative forms
[edit]Verb
[edit]swear upon (third-person singular simple present swears upon, present participle swearing upon, simple past swore upon, past participle sworn upon)
- (transitive, formal) To take an oath on someone or something.
- to swear upon the Holy Writ to speak the truth
- 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, →OCLC, [Act II, scene ii]:
- I'll swear upon that bottle to be thy true subject, for the liquor is not earthly.