Old Testament Scripture had repeatedly referred to God’s right hand when it described him in action (Exodus 15:6, Exodus 15:12; Psalm 44:3; Psalm 63:8; Psalm 118:15–16; Isaiah 48:13). That he is holding this scroll in his right hand indicates that God wishes action in relation to this scroll.
1 Then I saw in the right hand of him who was seated on the throne a scroll written within and on the back, sealed with seven seals.