Which preposition to use with adjures

by Occurrences 1%

Their impious march to God's high altar bend, With feet impure the sacred steps ascend; With wine unbless'd the holy chalice stain, Assume the mitre, and the cope profane; 35 To heaven their eyes in mock devotion throw, And to the cross with horrid mummery bow; Adjure by mimic rites the powers above, And plite alternate their Satanic love.

in Occurrences 1%

There seems to have been much improper conversation among the canons, for they are specially adjured in Christ to abstain from repeating immoral stories.

Which preposition to use with  adjures