"A great and awesome wonder is seen in you, O Father!"

St. John the Russian (source)

  
A great and awesome wonder is seen in you, O Father! For many years after your burial in the tomb, O blessed one, your body is kept incorrupt! But through this you glorify the Lord Who glorified you.
-from the Matins Canon of St. John the Russian
  
(source)
  

Through the prayers of our Holy Fathers, Lord Jesus Christ our God, have mercy on us and save us! Amen!