וַיַּ֤עַשׂ גַּם־הוּא֙ מַטְעַמִּ֔ים וַיָּבֵ֖א לְאָבִ֑יו וַיֹּ֣אמֶר לְאָבִ֗יו יָקֻ֤ם אָבִי֙ וְיֹאכַל֙ מִצֵּ֣יד בְּנ֔וֹ בַּעֲב֖וּר תְּבָרֲכַ֥נִּי נַפְשֶֽׁךָ׃
E hizo él también guisados, y trajo á su padre, y díjole: Levántese mi padre, y coma de la caza de su hijo, para que me bendiga tu alma.
Akeidat Yitzchak
For that reason, and in order to avoid application by G'd of the harshest most painful detergents, Israel is exhorted by the prophet to do penitence. Failing this, removal of the stains on its character by outside forces will leave permanent scars on its body. If, however, Israel will take action herself to wash and cleanse its heart from evil, instead of waiting for the suffering imposed by outside pressures, it will be helped, will experience salvation. Jeremiah 2,21, then discusses repentance due to fear of retribution, whereas chapter four discusses repentance occasioned by love for G'd.