Malachi 3:20:  

And the sun of mercy shall rise with healing in its wings for you who fear My Name. Then will you go forth and be fat as fatted calves.  

 וְזָרְחָה לָכֶם יִרְאֵי שְׁמִי שֶׁמֶשׁ צְדָקָה וּמַרְפֵּא בִּכְנָפֶיהָ וִיצָאתֶם וּפִשְׁתֶּם כְּעֶגְלֵי מַרְבֵּק:‏  

21: And you shall crush the wicked, for they will be as ash under the soles of your feet on the day that I will prepare, says the Lord of Hosts.  

 וְעַסּוֹתֶם רְשָׁעִים כִּי יִהְיוּ אֵפֶר תַּחַת כַּפּוֹת רַגְלֵיכֶם בַּיּוֹם אֲשֶׁר אֲנִי עֹשֶׂה אָמַר יְהֹוָה צְבָאוֹת  

Is Malachi talking about the Moshiach? And what is *healing in his wings*?