Malachi 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.
From one of my study Bibles: God and His glory are compared to the rising sun. See also Isaiah 60:1 and 19. Christ is the "rising sun" from Heaven.
I guess I am not seeing the Egyptian connection. God is often referred to as Light. Sun is light. I would think the two could be interchangeable. The Light (God) can heal, whether that be physical or spiritual sickness, hence the leaping about like calves. Healing is a prevalent theme throughout scripture.
But it is always good to dig into the Word and see what interesting nuggets are there. I need to do that more often, so thank you.
Reading ahead, it seems Malachi is talking about the coming "great and terrible" Day of the Lord and if the people don't repent, He will punish them as He did to Edom. So this all makes perfect sense. He is going to send His Son to heal (save) the sinners from their certain spiritual death, as they cannot keep His perfect Law, and Elijah (or the spirit of Elijah in John the Baptist) is paving the way for Christ. If this were not to happen, they would be cursed by God. This will happen again when Elijah (could he be one of the Two Witnesses in Revelation?) appears before the Second Coming of Christ.
Everytime I read the Bible, I happen upon things I glossed over before. Awesome.