R. Joshua Isaac b. Jehiel Shapira (Eizel Harif; d. 1873), rabbi and talmudist. Known as Eizel Harif ("sharp") because he was one of the keenest intellects and most outstanding pilpulists of his day, he was av bet din successively at Kalvarija, Kutno, Tiktin, and, finally, Slonim.
R. Shapira was the author of (1) Emek Yehoshua (1942), in two parts: part 1-24 responsa on the Shulhan Arukh; part 2-16 occasional homilies; (2) Nahalat Yehoshu'a (1851), in two parts: part 1-responsa on several halakhot and various subjects in the Babylonian and Jerusalem Talmuds; part 2-Sabbath and festival homilies, and, at the end, a eulogy on his father; (3) No'am Yerushalmi, commentary and glosses on the Jerusalem Talmud-on Zera'im (1863), Mo'ed (1866), Nashim (1868), Nezikin (1869); (4) Ibbei ha-Nahal (1855?), homilies; (5) Sefat ha-Nahal (1859), homilies and comments on aggadot in the Babylonian and Jerusalem Talmuds; (6) Azat Yehoshu'a (1868), commentary on the questions asked by the "sages of Athens" (Bek. 8b); (7) Marbeh Ezah (1870), commentary on the aggadic statements of Rabbah bar Hana; (8) Marbeh Tevunah (1872), on the basic principles of the Babylonian and Jerusalem Talmuds. Shapira was one of the few scholars in his generation who attached as much value to the Jerusalem Talmud as to the Babylonian, a fact amply reflected in his commentaries.