Binding and Loosing and the keys of the Kingdom in the Old Testament

I run into a lot of protestants who argue that Jesus practiced sola scriptura. If you are a protestant who believes that then you believe that Jesus got all his teaching from the OT and nowhere but the OT. So where in the OT do we find biblical support for Jesus giving the keys to Peter and then telling him that what he binds is bound in heaven and what he looses is loosed in heaven?