Approximately a century after this prayer was incorporated into the daily liturgy, circa 1300, an apostate Jew, known as Pesach Peter, denounced it as a secret anti-Christian slur on the grounds that the word וריק—"varik", "and emptiness"—had, in gematria (Hebrew numerology) the value of 316, the same as ישׁו—Jesus. In vain did the rabbis defend the sentence on the grounds that the expression came from the Book of Isaiah, or that the whole prayer came from Joshua, and therefore must predate Christianity, or, if the prayer was attributed to Rav, living in 3rd-century Babylonia (Persia), that he never encountered a Christian.—It probably did not help that at roughly the same time a rabbinic commentary on the prayers, "Arugat haBosem" by Abraham ben Azriel, made the point that, in gematria, "vanity and emptiness" had the same value as ישׁו ומחמט—"Jesus and Mohammed". As a result of this, in various places the Christian authorities censored the sentence, usually omitting it.