Vayeira, Vayera, or Va-yera (וַיֵּרָא — Hebrew for "and He appeared,” the first word in the parashah) is the fourth weekly Torah portion (פָּרָשָׁה, parashah) in the annual Jewish cycle of Torah reading. It constitutes Genesis 18:1–22:24 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 is made up of 7,862 Hebrew letters, 2,085 Hebrew words, and 147 verses, and can occupy about 252 lines in a Torah Scroll (סֵפֶר תּוֹרָה, Sefer Torah). (In the book of Genesis, Parashah Miketz has the most letters, and Parashiyot Noach and Vayishlach have the most verses.)
Jews read it on the fourth Sabbath after Simchat Torah, generally in October or November. Jews also read parts of the parashah as Torah readings for Rosh Hashanah. Genesis 21 is the Torah reading for the first day of Rosh Hashanah, and Genesis 22 is the Torah reading for the second day of Rosh Hashanah. In Reform Judaism, Genesis 22 is the Torah reading for the one day of Rosh Hashanah.
The Book of Genesis (from the Latin Vulgate, in turn borrowed or transliterated from Greek γένεσις, meaning "origin"; Hebrew: בְּרֵאשִׁית, Bərēšīṯ, "In [the] beginning") is the first book of the Hebrew Bible (the Tanakh) and the Christian Old Testament.
The basic narrative expresses the central theme: God creates the world and appoints man as his regent, but man proves disobedient and God destroys his world through the Flood. The new post-Flood world is equally corrupt, but God does not destroy it, instead calling one man, Abraham, to be the seed of its salvation. At God's command Abraham descends from his home into the land of Canaan, given to him by God, where he dwells as a sojourner, as does his son Isaac and his grandson Jacob. Jacob's name is changed to Israel, and through the agency of his son Joseph, the children of Israel descend into Egypt, 70 people in all with their households, and God promises them a future of greatness. Genesis ends with Israel in Egypt, ready for the coming of Moses and the Exodus. The narrative is punctuated by a series of covenants with God, successively narrowing in scope from all mankind (the covenant with Noah) to a special relationship with one people alone (Abraham and his descendants through Isaac and Jacob).