Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
KJV

Jeremiah 21:3

Then said Jeremiah unto them, Thus shall ye say to Zedekiah:

Parallel Translations

LXXView canonical →
And Jeremias said to them, Thus shall ye say to Sedekias king of Juda,
Brenton's Septuagint Translation
LXX2012View canonical →
And Jeremias said to them, Thus shall you⌃ say to Sedekias king of Juda,
Septuagint in American English (2012)