Thirteen: The Number of Separation?

Biblical numerology studies have pointed out the negative associations of the number 13.  The first time the number is used in the AV text is Gen. 14:4 , and the context is rebellion.  In Deut. 13:13 we read of men of Belial; and, on the opposite end of the canon, we meet the antichrist in Rev. 13, the ultimate rebel. In reviewing Acts 13 recently, however, I noticed vs. 2, where the Holy Ghost said, "Separate me Barnabas and Saul..."  This reminded me of Ex. 13:2, where the firstborn is sanctified (separated), and Gen. 13:9, where Abram and Lot separate.  So I looked at every book with a 13th chapter, and for the most part found some type of separation therein.  Check it out for yourself.  Some noteworthy examples:

Lev. 13.  Separate the lepers (v.4, etc.)
Num. 13.  Spies are separated to view the land
Deut. 13.  Note the separation in v. 13!
Josh. 13.  Tribes separate
Judg. 13.  Birth of Samson, a separated Nazirite
1 Sam. 13.  Saul separates the people

Also, there are thirteen references to sanctification (setting apart) in Paul's epistles!

-------------------------------------------------------------

You might also do this with every book that contains a chapter 5.  In that study, I found a reference to death of some sort.  I don't take the position that 5 is the number of grace, though there may be some association (Rom. 5--grace; "Five bleeding wounds he bears..." etc.).  Even if there is, it's nowhere near as strong as the connection of five and death (Gen. 5:5; death, dying, devil, Satan, slain, sword...all five letters). 

A final one I'm working on is the number 12, i.e. looking at each chapter 12 in scripture for signs of Israel.  Gen. 12, Ex. 12, 1 Sam. 12, 1 Chr. 12, Is. 12, Dan. 12, Zech. 12, Mt. 12 - Acts 12, 1 Cor. 12 - 2 Cor. 12, Heb. 12, and Rev. 12 all have material dealing with Israel, and that's just skimming (haven't looked at every chapter 12 yet). 

"Great is our Lord, and of great power: his understanding is infinite."  Ps. 147:5