Pesikta Rabbati or P'siqta Rabbita (Hebrew: פסיקתא רבתי) is a collection of Aggadic Midrash (homilies) on the Pentateuchal and prophetic lessons, the special Sabbaths, etc. It was composed around 845 CE and probably called "rabbati" (the larger) to distinguish it from the earlier Pesiḳta.
In common with the latter it has five entire pisḳot—No. 15 ("Ha-Ḥodesh"), No. 16 ("Korbani Laḥmi"), No. 17 ("Wayeḥi ba-Ḥazi"), No. 18 ("Omer"), No. 33 ("Aniyyah So'arah"), and the larger part of No. 14 ("Para"), but otherwise it is very different from the Pesiḳta, being in every respect like the Tanḥuma midrashim.
In 1880 Friedmann edited a version of the Pesikta Rabbati which contains, in forty-seven numbers, about fifty-one homilies, part of which are combinations of smaller ones; seven or eight of these homilies belong to Ḥanukkah, and about seven each to the Feast of Weeks and New-Year, while the older Pesiḳta contains one each for Ḥanukkah and the Feast of Weeks and two for New-Year.
Pesiḳta Rabbati contains also homilies to lessons which are not paralleled in the Pesiḳta. There are also various differences between these two Pesiḳtot in regard to the feast-day lessons and the lessons for the Sabbaths of mourning and of comforting. The works are entirely different in content, with the exception of the above-mentioned Nos. 15-18, the part of No. 14, and some few minor parallels. The Pesiḳta contains no halakhic exordiums or proems by R. Tanḥuma. But in the Pesiḳta Rabbati there are not less than twenty-eight homilies with such exordiums having the formula "Yelammedenu Rabbenu," followed by proems with the statement "kak pataḥ R. Tanḥuma"; two homilies, Nos. 38 and 45, the first of which is probably defective, have the Yelammedenu without proems with "kak pataḥ," etc.