Vayeira, Vayera, or ( — Hebrew for "and He appeared," the first word in the parashah) is the fourth weekly Torah portion (, parashah) in the annual Jewish cycle of Torah reading. It constitutes . The parashah tells the stories of Abraham's three visitors, Abraham's bargaining with God over Sodom and Gomorrah, Lot's two visitors, Lot's bargaining with the Sodomites, Lot's flight, the destruction of Sodom and Gomorrah, how Lot's daughters became pregnant by their father, how Abraham once again passed off his wife Sarah as his sister, the birth of Isaac, the expulsion of Hagar, disputes over wells, and the binding of Isaac (, the Akedah).
The parashah has the most words (but not the most letters or verses) of any of the weekly Torah portions in the Book of Genesis, and its word-count is second only to Parashat Naso in the entire Torah. It is made up of 7,862 Hebrew letters, 2,085 Hebrew words, 147 verses, and 252 lines in a Torah Scroll (Sefer Torah). (In the Book of Genesis, Parashat Miketz has the most letters, and Parashiyot Noach and Vayishlach have the most verses.)
Jews read it on the fourth Sabbath after Simchat Torah, in October or November. Jews also read parts of the parashah as Torah readings for Rosh Hashanah. is the Torah reading for the first day of Rosh Hashanah, and is the Torah reading for the second day of Rosh Hashanah. In Reform Judaism, is the Torah reading for the one day of Rosh Hashanah.
In traditional Sabbath Torah reading, the parashah is divided into seven readings (, aliyot). In the Masoretic Text of the Tanakh (Hebrew Bible), Parashat Vayeira has four "open portion" (, petuchah) divisions (roughly equivalent to paragraphs, often abbreviated with the Hebrew letter (peh)). Parashat Vayeira has two further subdivisions, called "closed portion" (, setumah) divisions (abbreviated with the Hebrew letter (samekh)) within the first open portion. The first open portion, petuchah) spans the first five readings. The second open portion coincides with the sixth reading.