Aspects of this topic are discussed in the following places at Britannica.
...forbidden: (1) a vain oath, in which one attempts to do something that is impossible to accomplish, denies self-evident facts, or attempts to negate the fulfillment of a religious precept, and (2) a false oath, in which one uses the name of God to swear falsely, thus committing a sacrilege. At the time of Jesus in the 1st century, oaths were often misused and, for that reason, were often rebuked...
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