kjv@Acts:23:12@ And when it was day, certain of the Jews banded together, and bound themselves under a curse, saying that they would neither eat nor drink till they had killed Paul.
How Paul's nephew found out about the Jewish assignation plot we are not told. Being at the right place at the right time I suppose. It could be that someone from within the Jew's confidence sought him out as well; which makes the account all the more interesting.
2012 - pBiblx2 Field Wise Bible System Version 2.0.9d - GPL3