What is the authenticity of that the hadith about Muhammad s.a.w entering Jewish Synagogue asking Jews to believe?

Musnad Ahmed - 23464 > Narrated Awf bin Malik: > > The Prophet (SAW) and I with him went one day until we entered a > Jewish Synagogue in Al-Madinah on a holiday of theirs. They hated our > entrance on them. So the Messenger of Allah (SAW) said, > > "O ye Jews, show me twelve men [among the Jews] who believe that there > is no God but Allah and that Mohammad is his messenger, and Allah will > spare all the Jews under heaven his wrath the wrath he has." > > They [the Jews] silenced everyone and no one answered him. So he > repeated what he said and no one answered. So he repeated it for the > third time and no one answered. So he said, > > "You refuse! By Allah, I am the last [Prophet] and I am the final > [Prophet] and I am the chosen Prophet; whether you believe or not. I can't find the rest of the hadith. **Question:** What is the rest of the hadith, and is this an authentic narration?!