Antipatris in the New Testament
Antipatris is mentioned in Scripture only once, in connection with the descent of Paul from Jerusalem to Caesarea (Acts 23:31). References will be found in Ant, XIII, xv 1; XVI, v, 2; BJ, I, xxi, 9. It was a town built by Herod the Great, and called after his father Antipater. It is probably identical with the modern Heb: Ras el-`Ain, "fountain head," a large mound with ruins at the source of Heb: Nahr el`Aujeh, in the plain to the Northeast of Jaffa. There are remains of a crusading castle which may be the Mirabel of those times.
International Standard Bible Encyclopedia, which is in the public domain (with minor edits).