As far as I know, there is one hadith which talks about your question, but I guess the name of the Jewish Scholar is not mentioned though.
It was an incident when Prophet Muhammad (pbuh) had to judge between a couple who were the culprits of adultery, then Prophet (pbuh) called upon a scholar from the Jews to confirm what he is saying about the Torah is right or wrong.
Hadith # 4214 in this page of "The Book Pertaining to Punishments Prescribed by Islam (Kitab Al-Hudud)"
Al-Bara' b. 'Azib reported: There happened to pass by Allah's Apostle (may peace be upon him) a Jew blackened and lashed. Allah's Apostle (may peace be upon him) called them (the Jews) and said: Is this the punishment that you find in your Book (Torah) as a prescribed punishment for adultery? They said: Yes. He (the Holy Prophet) called one of the scholars amongst them and said: I ask you in the name of Allah Who sent down the Torah on Moses if that is the prescribed punishment for adultery that you find in your Book. He said: No. Had you not asked me in the name of Allah, I would not have given you this information. We find stoning to death (as punishment prescribed in the Torah). But this (crime) became quite common amongst our aristocratic class. So when we caught hold of any rich person (indulging in this offence) we spared him, but when we caught hold of a helpless person we imposed the prescribed punishment upon him. We then said: Let us argree (on a punishment) which we can inflict both upon the rich and the poor. So We decided to blacken the face.............
May the creator guide us all.