'Efficacy' in the Bible

For their efficacy depends only on meats and drinks and various washings, ceremonies pertaining to the body and imposed until a time of reformation.

this Priest, on the contrary, after offering for sins a single sacrifice of perpetual efficacy, took His seat at God's right hand,

And another angel came and stood at the altar, having a golden censer; and much incense was given to him, that he might give efficacy to the prayers of all saints at the golden altar which was before the throne.