King James Version (KJV)
And they shall teach my people {the difference} between the holy and profane, and cause them to discern between the unclean and the clean.
Modern English
They shall teach my people the difference between the holy and the common, and cause them to discern between the unclean and the clean.
Hebrew
וְאֶת־עַמִּ֣י יוֹר֔וּ בֵּ֥ין קֹ֖דֶשׁ לְחֹ֑ל וּבֵין־טָמֵ֥א לְטָה֖וֹר יוֹדִעֻֽם׃
vʾet-ʿamiy yvorv beyn qodesh lḥol vbeyn-ṭameʾ lṭahvor yvodiʿum