1 Peter 5:6-11
Dearly beloved: Be you humbled under the mighty hand of God, that He may exalt you in the time of visitation; casting all your care upon Him, for He hath care of you. Be sober and watch, because your adversary the devil, as a roaring lion, goeth about seeking whom he may devour. Whom resist ye, strong in faith; knowing that the same affliction befalls your brethren who are in the world. But the God of all grace, who hath called us unto the eternal glory in Christ Jesus, after you have suffered a little, will Himself perfect you, and confirm you, and establish you. To Him be glory and empire for ever and ever. Amen.
Denzinger
907: The Doctrine of the Sacrament of Extreme Unction
COUNCIL OF TRENT SESSION XIII (Oct. II, 1551) Decree On the Most Holy Eucharist Chap. 9. The Works of Satisfaction
It has seemed fit to the holy Synod to add to the preceding doctrine on penance the following matters concerning the sacrament of extreme unction, which was considered by the Fathers * the consummation not only of penance, but also of the whole Christian life which should be a perpetual penance. In the first place, therefore, as regards its institution it declares and teaches that our most clement Redeemer, who wished that a provision be made for salutary remedies at all times for His servants against all the weapons of all enemies, just as He made provision for the greatest aids in other sacraments by which Christians, as long as they live, can preserve themselves free from every very grave spiritual injury, so He fortified the end of life with, as it were, the most powerful defense, by the sacrament of extreme unction [can. 1 ]. For, although “our adversary seeks” and seizes throughout our entire life occasions “to devour” [1 Pet. 5:8] our souls in every manner, yet there is no time when he directs more earnestly all the strength of his cunning to ruin us completely, and if possible to drive us also from faith in the divine mercy, than when he sees that the end of life is upon us.