Andrew of Caesarea
The great voice of this angel signifies, in a figurative way, the prayer of all the heavenly powers. They desire to see the glorification of the righteous and the cutting off of the iniquities of sinners.
Through this, everything movable and swiftly passing is rejected, and what is firm and eternal will be revealed. "The grass of the earth is dried up" indicates that the final time has come.
Then the seed of piety, ripened like wheat that has borne fruit for the husbandman thirty, sixty, and a hundredfold, will be counted worthy of the heavenly granaries.