Numbers 18:3

And they shall keep thy charge, and the charge of all the tabernacle: only they shall not come nigh the vessels of the sanctuary and the altar, that neither they, nor ye also, die.

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Prayer Before Mass

Receive, O Holy Trinity, One God, this Holy Sacrifice of the Body and Blood of our Lord Jesus Christ, which I, Your unworthy servant, desire now to offer to Your Divine Majesty by the hands of this Your minister, with all the Sacrifices which have ever been or will be offered to You, in union with that most Holy Sacrifice offered by the same Christ our Lord at the Last Supper, and on the Altar of the Cross. I offer it to You with the utmost affection of devotion, out of pure love for Your infinite goodness, and according to the most holy intention of the same Christ our Lord, and of our Holy Mother the Church. O God, almighty and merciful, grant us through this Holy Sacrifice, joy and peace, a holier life, time to do penance, grace and consolation of the Holy Spirit, and perseverance in good works. Amen.

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