"The Sun of Righteousness did not burst upon the world in splendor, to dazzle the senses with His glory. It is written of Christ, “His going forth is prepared as the morning.” Hosea 6:3 . Quietly and gently the daylight breaks upon the earth, dispelling the darkness and waking the world to life. So did the Sun of Righteousness arise, “with healing in His wings.” Malachi 4:2 . MH 32.3"
"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."
EGW directly quotes Malachi 4:2 and connects it to Christ, making it a clear explicit allusion.
"Then shall we know, if we follow on to know the Lord: his going forth is prepared as the morning; and he shall come unto us as the rain, as the latter and former rain unto the earth."
Ellen White directly references Hosea 6:3 in this passage.