Secret Codes in Jeremiah

I found this interesting. Jeremiah or Baruch (his scribe) disguised names of rival countries in the book of Jeremiah for various reasons. One obfuscation technique that Old Testament writers used is called, "atbash".

In his commentary, J. A. Thompson, defines what an "Atbash" is:

"Atbash" is a device in which the letters of a name counted from the beginning of the alphabet are exchanged for letters counted from the end: Zimki would be 'Elam in the Hebrew alphabet, and bbl (Babel) would be ssk (Shesak, in v.[25:]26). In these ciphers aleph is replaced by by taw (t), beth (b) by shin (s), etc. (p. 518)

Old Testament scholar, Walter Kaiser, calls "atbash" a cryptogram. The cryptogram technique is used in Jeremiah 51:1.

Jeremiah 51:1-4
Thus says the LORD: “Behold, I will stir up the spirit of a destroyer against Babylon, against the inhabitants of Leb-kamai, and I will send to Babylon winnowers, and they shall winnow her, and they shall empty her land, when they come against her from every side on the day of trouble. Let not the archer bend his bow, and let him not stand up in his armor. Spare not her young men; devote to destruction all her army. They shall fall down slain in the land of the Chaldeans, and wounded in her streets. (ESV)

Kaiser's commentary on Jeremiah 51:1

God calls Babylon “Leb Kamai” (…), which means “the heart of those who rise against me.” But this is also a cryptogram, known as an atbash (see 25:26 for an explanation), so that the Heb. consonants lbqmy are reversed to spell instead kysdm, a disguised form of Chaldea/Babylon. It is employed here not because the name of Babylon is a secret for Jeremiah has already revealed the name (v. 1b), but so that the citizens of that land might realize that they are those who were opposing Yahweh from their hearts. (Kaiser, p. 565)

Earlier in Jeremiah (Jer. 25:26), Kaiser comments on a different passage using this same technique. The following is Kaiser's translation.

"all the kings of the north, near and far, one after another-- all the kings of the earth. After all of them, the king of Shesach will drink it too."

Here is Kaiser's comment on the passage:

Babylon is finally mentioned in v. 26b; however, it appears in cryptic fashion in a figure of speech knows as an atbash cryptogram. The word used here is “Sheshach” (v. 26b; 51:41). In this cryptogram, the alphabet is divided in halves so that the letters corresponding to the word “Sheshach” are read from the opposite half of the alphabet in reverse order. “Sheshach yields “B(a)b(e)l.” (Kaiser, p. 302)

Conclusion

I have no idea of the spiritual significance of the encryption. In the passage in Jeremiah 51, Baruch referenced both the name "Babylon" and its atbash "Leb-kamai." Baruch was not just encrypting names to protect himself. The original readers must have known its significance. The care the writers used in writing Jeremiah is displayed in details like this. To plumb scripture's depths and beauties is a lifelong pursuit.

Bibliography

1. Walter C. Kaiser, JR., Tiberius Rata, Walking the Ancient Paths: A Commentary on Jeremiah, (2019)

2. J. A. Thompson, The New International Commentary on the Old Testament: The Book of Jeremiah, (2019)