Jacob, Son if Isaac and grandson of Abraham had twelve sons whose names became the 12 tribes of Israel. (see Genesis 35:23-26, Exodus 1:2-5, Numbers 1:20-43, 1 Chronicles. 2:2 and Revelation 7:5-8)
The Seven churches of Revelation, or Seven churches of Apocalypes or Seven churches of Asia.
John, to the seven churches which are in Asia:
Grace to you and peace from Him who is and who was and who is to come, and from the seven Spirits who are before His throne, and from Jesus Christ, the faithful witness, the firstborn from the dead, and the ruler over the kings of the earth.
To Him who loved us and washed us from our sins in His own blood, and has made us kings and priests to His God and Father, to Him be glory and dominion forever and ever. Amen.
Behold, He is coming with clouds, and every eye will see Him, even they who pierced Him. And all the tribes of the earth will mourn because of Him. Even so, Amen.
"I am the Alpha and the Omega, the Beginning and the End," says the Lord, "who is and who was and who is to come, the Almighty." Rev. 1: 4-8