Some prayers even ask the saints to act by their own delegated power and command
Besides, in the usage of the Roman Church there are quite a few prayers addressed to the saints in which they are asked not only for the goods of grace and glory, but also to give these to us by the power entrusted to them, by their own order and command. That is plainly something other than obtaining such goods for us from God by their prayers.
So the apostles together are addressed: "You who shut heaven by your word and loose its bolts, loose us from all our sins by your command, we pray." And: "Health and sickness of all are subject to your command; heal those sick in their ways, restoring us to virtue." And again: "Command that we, guilty men, be loosed from our guilt, we pray." And to the Apostle Peter in particular: "By the power given you, loose the chains of sin, you who by your word shut heaven to all and open it."
We proved this more fully above as well.
Latin
XCIV. Adde quod in usu Ecclesiae Romanae non paucae preces ad Sanctos directae reperiuntur, in quibus ab ipsis non solum postulantur bona Gratiae & Gloriae, sed etiam rogantur ut ea nobis praestent tradita sibi potestate, & jussu ac praecepto suo. Quod plane aliud est quam ejusmodi bona suis orationibus nobis a Deo impetrare. Veluti quum Apostolis in communi dicitur, Qui caelum verbo clauditis, Serasque ejus solvitis, Nos a peccatis omnibus, Solvite jussu quaesumus. Quorum praecepto subditur, Salus & languor omnium, Sanate aegros moribus, Nos reddentes virtutibus. Item, Nos a reatu noxios, Solvi jubete quaesumus. Et speciatim ad Petrum Apostolum, Peccati vincula Resolve tibi potestate tradita, Qua cunctis caelum Verbo claudis, aperis. Ut supra quoque fusius a nobis probatum est.