There is a lot of revelation in it.
Jacob (Israel) had twelve sons, each of which represented a tribe begun by a prince, for 12 princes total. Ishmael, who was born to Abraham through Hagar, also had twelve princes.
God specified that twelve unleavened cakes of bread be placed every week in the temple with frankincense next to each of the two piles that were to be made. The priests were commanded to change the bread every Sabbath day (Leviticus 24).
Used 735 times (54 times in the book of Revelation alone), the number 7 is the foundation of God's word. If we include with this count how many times 'sevenfold' (6) and 'seventh' (119) is used, our total jumps to 860 references.
Seven is the number of completeness and perfection (both physical and spiritual). It derives much of its meaning from being tied directly to God's creation of all things. According to some Jewish traditions, the creation of Adam occurred on September 26, 3760 B.C. (or the first day of Tishri, which is the seventh month on the Hebrew calendar). The word 'created' is used 7 times describing God's creative work (Genesis 1:1, 21, 27 three times; 2:3; 2:4). There are 7 days in a week and God's Sabbath is on the 7th day.
The Bible, as a whole, was originally divided into 7 major divisions. They are 1) the Law; 2) the Prophets; 3) the Writings, or Psalms; 4) the Gospels and Acts; 5) the General Epistles; 6) the Epistles of Paul; and 7) the book of Revelation. The total number of originally inspired books was forty-nine, or 7 x 7, demonstrating the absolute perfection of the Word of God.