Various numbers play a significant role in Jewish texts or practice. Some such numbers were used as mnemonics to help remember concepts, while other numbers were considered to have intrinsic significance or allusive meaning.
The song Echad Mi Yodea ("who knows one?"), sung at the Passover Seder, is known for recounting a religious concept or practice associated with each of the first 13 numbers.
In Jewish historical study, numbers were believed to be a means for understanding the divine. This marriage between the symbolic and the physical found its pinnacle in the creation of the Tabernacle. The numerical dimensions of the temple are a "microcosm of creation ... that God used to create the Olamot-Universes."[1]
In the thought system of Maharal, each number has a consistent philosophical meaning: 1 - unity. 2 - dualism and multiplicity. 3 - the unity between two extremes. 4 - multiplicity in two directions, like the cardinal directions. 5 - the center point which unifies those four extremes. 6 - multiplicity in three dimensions. 7 - the center point which unifies all of nature, as with Shabbat. 8 - the supernatural realm which feeds nature, and the striving of man for a connection with the supernatural. 9 - the most complete multiplicity, including division between the natural and supernatural. 10 - the final unification between natural and supernatural.[2]
1
One is our God, in heaven and on earth - אחד אלוהינו שבשמיים ובארץ
2
Two are the tablets of the covenant - שני לוחות הברית
Three are the Fathers (Patriarchs) - שלושה אבות (Abraham, Isaac and Jacob)
The three sons of Noah (Ham, Shem and Japheth)
Number of aliyot on a non-Yom Tov Monday and Thursday Torah reading and number of aliyot in Shabbat Mincha
The Holy of Holies occupied one-third of the area of the Temple (and previously, Tabernacle)
The angels declared that God was "Holy, holy, holy" for a total of three times[3]
The Priestly Blessing contains three sections
On the third day the Jewish people received the torah
4
Four are the Mothers (Matriarchs) - ארבע אימהות (Sarah, Rebecca, Rachel, and Leah)
The number of aliyot on Rosh Chodesh
At the Passover Seder four cups of wine are drunk, and four expressions of redemption are recited
Both the heavens[4] and earth[5] were described as having four sides or corners, similar to the cardinal directions.
5
Five are the books of the Torah - חמישה חומשי תורה
Of the Ten Commandments, five were written on each of the two tablets.[6]
The sections of the book of Psalms
The number of knots in the tzitzit
Number of aliyot on Yom Tov that does not coincide with Shabbat
Five species of grain
6
Six are the books of the Mishnah - שישה סידרי משנה
The six working days of the week
The six days of Creation
7
Number of days in the weekly cycle including counting of the Sabbath - שיבעה ימי שבתא
According to a midrash, "All sevens are beloved": There are seven terms for the heavens and seven terms for the earth; Enoch was the seventh generation from Adam; Moses was the seventh generation from Abraham; David was the seventh son in his family; Asa (who called out to God) was the seventh generation of Israelite kings; the seventh day (Shabbat), month (Tishrei), year (shmita) and shmita (jubilee) all have special religious status.[7]
There were seven of every pure animal in Noah's Ark
The number seven is said to symbolize completion, association with God, or the covenant of holiness and sanctification
Moses died on the seventh of Adar
8
Eight are the days of the circumcision - שמונה ימי מילה
Total number of days of Yom Tov in a year in Israel
Number of days of Chanukah
8 days of sukkos
Number of days of Pesach (Diaspora)
According to the Zohar, the number eight signifies new beginnings because the eighth day was the first day after creation when God returned to work; the week began again.[citation needed]
9
The first nine days of the Hebrew month of Av are collectively known as "The Nine Days" (Tisha HaYamim), and are a period of semi-mourning leading up to Tisha B'Av, the ninth day of Av on which both Temples in Jerusalem were destroyed
10
The Ten Commandments - עשרה דיבריא
The ten Plagues of Egypt
Ten Jewish people form a minyan
There are ten Sefirot (human and Godly characteristics) depicted in Kabbalah
According to the Mishna, the world was created by ten divine utterances; ten generations passed between Adam and Noah and between Noah and Abraham; Abraham received ten trials from God; the Israelites received ten trials in the desert; there were ten plagues in Egypt; ten miracles occurred in the Temple; ten apparently supernatural phenomena were created during twilight in the sixth day of creation.[10] The number ten in this Mishna indicates a large number (e.g. the Mishna declares that Abraham's willingness to undergo ten trials "indicates his love for God").
11
Eleven are the stars of the Joseph's dream - אחד עשר כוכביא
There are eleven spices in the Incense offering
12
Twelve are the tribes of Israel - שנים עשר שיבטיא
Ritual items frequently came in twelves to represent the role of each tribe. The high priest's breastplate (hoshen) had twelve precious stones embedded within them, representing the 12 tribes. Elijah built his altar with 12 stones to represent the tribes,[11] Moses built 12 pillars at Sinai representing the tribes,[12] and Joshua erected twelve memorial stones at the Jordan River representing the tribes.[13]
"All of God's creations are equal in number to the 12 tribes: 12 astrological signs, 12 months, 12 hours of the day, 12 hours of the night, 12 stones that Aaron [the high priest] would wear."[14]
The Temple Mount could be accessed through twelve gates
Age of Bat Mitzvah, when a Jewish female becomes obligated to follow Jewish law
There were twelve loaves of show-bread on the shulchan (table) in the Beit Hamikdash
Sons of Jacob
Number of springs of water Elim
13
Thirteen are the attributes of Hashem - שלושה עשר מידיא
Age of Bar Mitzvah, when a Jewish male becomes obligated to follow Jewish law
The number of books in the Mishnah Torah, also entitled Yad Hahazaka in which the word Yad has gematria 14
15
One of two numbers that is written differently from the conventions of writing numbers in Hebrew in order to avoid writing the name of God.[15] The other is 16.
The number of words in the Priestly Blessing
16
One of two numbers that is written differently from the conventions of writing numbers in Hebrew in order to avoid writing the name of God. The other is 15.
18
Gematria of "chai", the Hebrew word for life. Multiples of this number are considered good luck and are often used in gift giving.
The Amidah is also known as "Shemoneh Esreh" ("Eighteen"), due to originally having 18 blessings, though a 19th blessing was later added
19
The number of years in a cycle of the Hebrew calendar, after which the date on the lunar calendar matches the date on the solar calendar
Blessings in the weekday Amidah
20
Minimum age to join the Israelite army
In halakhah, the death penalty was only carried out if the offender was at least 20 years old