What is the sacramental principle at work with Anointing of the Sick?

Of the seven sacraments in the Catholic Church. I see how each of them are some form of Sacramentum, an oath between man and God. 1. Marriage has a marital vow 2. Holy orders is a vow to be a priest, deacon or bishop. 3. Reconciliation is a resolution to "Go and sin no more" 4. In Holy Communion we say, Amen to "The Body of Christ" 5. In Baptism we resolve to enter more into the Body of Christ 6. and in Confirmation we renew and confirm that resolution. But, what is the oath in Anointing of the Sick? To die peacefully?