When Jesus returns, he will come in glory together with his angels (see also 2 Thessalonians 1:7; Revelation 20:11–15; Mark 13:26–27). The final judgment of the world has been committed to the Son of Man. The glory of his Father
refers to all his divine attributes that will shine forth for all creatures to see. Jesus coming in his Father’s glory will therefore be shown to be possessing glory equal to that of his Father.
In using this imagery, Jesus is taking up language from Daniel 7:1–28, where the Son of Man is given eternal sovereignty over all nations.
38 For whoever is ashamed of me and of my words in this adulterous and sinful generation, of him will the Son of Man also be ashamed when he comes in the glory of his Father with the holy angels.”