Just some of my comments from a Jewish roots perspective on Malachi 4.
Mal 4:1 For, behold, the day cometh, that shall burn as an oven; and all the proud, yea, and all that do wickedly, shall be stubble: and the day that cometh shall burn them up, saith the LORD of hosts, that it shall leave them neither root nor branch.
Mal 4:2 But unto you that fear my name shall the Sun of righteousness arise with healing in his wings; and ye shall go forth, and grow up as calves of the stall.
1. The "Sun of Righteousness" is the Messiah.
2. "Healing in his wings" is a reference that he will heal the infirmed. In ancient Judaism, the Tallit (prayer shawl), is worn as a traditional garment. The edges of the Tallit have fringes (Tzitzit) sewn on that are reminders of the 613 Laws of Moses. The edges of the Tallit are considered "wings". So it is considered that there is "healing" under the cover of the "wings", or Mosaic Law. Now for the cool part.......Jesus healed the woman with the issue of blood when she "Touched the hem of his Garment", or in other words she touched the Tzitzit of his Tallit.
Mar 5:27 When she had heard of Jesus, came in the press behind, and touched his garment.
Mar 5:28 For she said, If I may touch but his clothes, I shall be whole.
Mar 5:29 And straightway the fountain of her blood was dried up; and she felt in [her] body that she was healed of that plague.
Mar 5:30 And Jesus, immediately knowing in himself that virtue had gone out of him, turned him about in the press, and said, Who touched my clothes?
The woman knew the OT prophecy, knew that the Messiah would have healing in his wings. She knew that healing was in the Law under Messiah. Don't forget, Jesus wore aa Tallit as a Torah observant Jew.
3. "calves bought up in the stall' is a Jewish idiom regarding the Messianic Kingdom, known as the Messianic Millennium.
Mal 4:3 And ye shall tread down the wicked; for they shall be ashes under the soles of your feet in the day that I shall do [this], saith the LORD of hosts.
During the Messianic Millennium, Messiah will reign from Jerusalem, but there will be lawless people outside of Millennial Israel. These will meet their ultimate defeat after the Millennial period is complete.
Mal 4:4 Remember ye the law of Moses my servant, which I commanded unto him in Horeb for all Israel, [with] the statutes and judgments.
Mal 4:5 Behold, I will send you Elijah the prophet before the coming of the great and dreadful day of the LORD:
Of course this is prophecy to be fulfilled as Elijah will be one of the 2 witnesses found in Revelation who will announce the return of the Messiah.