An oath, i.e. a form of cursing or imprecatory oaths, that when they would curse a person, they may wish that they may be as cursed and miserable as thou wast upon this occasion. See the phrase Isa_65:15Jer_29:22 and compare Gen_48:20Rth_4:11,12.
Thy thigh; a modest signification of the genital parts, used both in Scripture, as Gen_46:26Exo_1:5, and other authors, that the sin might be evident in the punishment.
To rot, Heb. to fall, i.e. to die or waste away, as the word is used, 1Ch_21:14, compared with 2Sa_24:15.
To swell, suddenly and violently till it burst, which the Jews note was frequent in this and like cases, as Exo_32:20. And it was a clear evidence of the truth of their religion.