It is the holy ointment, which one is anointed after Baptism. Confirmation like Baptism is performed once and cannot be repeated. Through the sacrament of confirmation, the believer is granted the gift of the Holy Spirit. In the Apostolic times the baptized person was granted the Holy Spirit by the laying of the hands. (Acts 20:14-17). When the church expanded, however, the bishops who continued the works of the Apostles permitted the replacement of the laying of hands by the anointing of the Holy Oil.
The gift of the Holy Spirit with mayron, (confirmation), has Biblical foundation. The believer is anointed with the Holy Oil immediately after Baptism. When the Apostles baptized children and grown ups, the baptized person was granted the gift of the Holy Spirit. (Acts 8: 14-17; 19:5-6).
Children should be anointed with Myron as soon as they are baptized so that they receive the gift of the Holy Spirit. The Bible confirms that let alone after birth, there were children who were granted the Holy Spirit while they were still in the wombs of their mothers. (Lk. 1:15; Jer. 1:1-8).
The right to anoint was originally confined to the Apostles but later passed on to bishops, and then priests were also authorized to administer the sacrament.