King James Version (KJV)
Give them sorrow of heart, thy curse unto them.
Modern English
You will give them dullness of heart; your curse will be on them.
Hebrew
תִּתֵּ֥ן לָהֶ֛ם מְגִנַּת לֵ֖ב תַּאֲלָתְךָ֥ לָהֶֽם׃
titen lahem mginat leb taʾalatka lahem