Reference for Jeremiah 21:3

וַיֹּ֥אמֶר יִרְמְיָ֖הוּ אֲלֵיהֶ֑ם כֹּ֥ה תֹאמְרֻ֖ן אֶל־צִדְקִיָּֽהוּ׃

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

BDB