The saints are not our intercessors and advocates: that title is Christ's alone
However that may be, the Reformed theologians agree in denying that the saints are, or can rightly be called, our intercessors and advocates.
Only he deserves the title of our intercessor with God who can hear and take in the prayers of all people and of each one, at once and at all times, and whose office it is to offer and commend them to God. That, they hold, fits our Lord Jesus Christ alone. Nor would anyone call the believers living here our intercessors and advocates merely because, out of mutual love, we ought to pray for one another.
Latin
XLIX. Quicquid vero de eo sit, communi consensu negant Theologi Reformati Sanctos esse & recte dici Intercessores & Advocatos nostros. Quoniam intercessoris nostri apud Deum titulum solus ille meretur, qui potest omnium & singulorum preces simul & omni tempore audire atque percipere, idque habet muneris, ut illas Deo offerat & commendet. Quod uni Domino nostro Jesu Christo convenire sentiunt. Nec quisquam dixerit fideles hic degentes esse intercessores & advocatos nostros, propterea quod alii pro aliis, ex charitate mutua, orare debeamus.