Commentaries:
Jamieson, Fausset, and Brown
therefore I do visit the iniquity thereof upon it; and the land itself vomiteth out her inhabitants—The Canaanites, as enormous and incorrigible sinners, were to be exterminated; and this extermination was manifestly a judicial punishment inflicted by a ruler whose laws had been grossly and perseveringly outraged. But before a law can be disobeyed, it must have been previously in existence; and hence a law, prohibiting all the horrid crimes enumerated above—a law obligatory upon the Canaanites as well as other nations—was already known and in force before the Levitical law of incest was promulgated. Some general Iaw, then, prohibiting these crimes must have been published to mankind at a very early period of the world's history; and that law must either have been the moral law, originally written on the human heart, or a law on the institution of marriage revealed to Adam and known to the Canaanites and others by tradition or otherwise.
Other Jamieson, Fausset, and Brown entries containing Leviticus 18:25:
Leviticus 18:24
Ezekiel 16:3
Micah 2:10
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