Following are a number of back-translations as well as a sample translation for translators of Jeremiah 9:23:

• Kupsabiny: “God is saying,
  No person should boast of his/her wisdom
  or another boast of his/her strength,
  and a person should not boast of his/her wealth.” (Source: Kupsabiny Back Translation)
• Hiligaynon: “The LORD still said, ‘A wise-one should not boast his wisdom, or the strong-one of his strength, or a rich-one of his wealth.” (Source: Hiligaynon Back Translation)
• English: “Yahweh says this:
  ‘Wise men should not boast about their being wise,
  strong men should not boast about their being strong;
  and rich people should not boast about their being rich.” (Source: Translation for Translators)