Although there is no clear source of information about Nicodemus outside the Gospel of John, Ochser and Kohler (in an article in "The Jewish Encyclopedia") and some historians have speculated that he could be identical to Nicodemus ben Gurion, mentioned in the Talmud as a wealthy and popular holy man reputed to have had miraculous powers. Others point out that the biblical Nicodemus is likely an older man at the time of his conversation with Jesus, while Nicodemus ben Gurion was on the scene 40 years later, at the time of the Jewish War.