1;  The book sealed with seven seals,
  9;  which only the Lamb that was slain is worthy to open.
 12;  Therefore the elders praise him, and confess that he
     redeemed them with his blood.

 * that sat.
  4:3 
 * a book.
  10:2,8-11  Isa 34:16  Eze 2:9,10 
 * sealed.
  6:1  Isa 8:16  29:11  Da 8:26  12:4-9