​The sacrament of Anointing of the Sick is given to those who are seriously ill by anointing them on the forehead and hands with duly blessed oil - pressed from olives or from other plants - saying, only once: "Through this holy anointing may the Lord in his love and mercy help you with the grace of the Holy Spirit. May the Lord who frees you from sin save you and raise you up."   
​Cf. CIC, Can. 847 § 1.

Anointing of the sick the sacrament which is administered to bring spiritual and even physical strength during an illness, especially near the time of death. It is likely to be one of the last sacraments a person will receive. A sacrament is an outward sign established by Jesus to confer inward grace (basically, it is a rite that is performed to convey God’s grace to the recipient, through the power of the Holy Spirit).  A person can receive this sacrament more than once.