Well I guess in a way asking for her intercession (or any saint's intercession, but perhaps especially hers given her unique relationship as the mother of our Lord, God, and Savior) is asking for a kind of reprieve, no matter the wording. I mean, we do say in one of the hymns for Kiahk (the 4th Coptic month of the year, c. early December to early January, which is especially dedicated to the veneration of the Theotokos and is popularly called "St. Mary's month", for obvious reasons considering that we celebrate the Nativity on January 7th) "No boldness have we before God, but by your intercessions", and of course we also call her "the ark of salvation" and many similar things. Whether or not we have the exact phrase that is in an EO hymn, I couldn't say.