For example, the Jewish historian Flavius Josephus said of a Jewish sect: “Swearing they avoid, regarding it as worse than perjury, for they say that one who is not believed without an appeal to God stands condemned already. ”
وَرَأَتْ أَنَّ كُلَّ مَنْ يَلْجَأُ إِلَى ٱلْحَلْفِ لِيُؤَكِّدَ كَلَامَهُ هُوَ كَاذِبٌ بِلَا شَكٍّ » .‏