Halpetha (Halafta), says in his work, Seder Olam, chapter 30, that the wars waged by Ben Koziba (i.e. Bar Kokhba) lasted two and half years, although the siege on the Jewish stronghold, Betar, is said to have lasted three and a half years.
Halpetha (Halafta), di na súa obra, Seder Olam, capítulo 30, que as guerras libradas por Ben Koziba (Bar Kokhba) duraron dous anos e medio, aínda que o asedio á fortaleza xudía, Betar, durou tres anos e medio.