Prayer for Protection of Soul at Death

"O Only-Begotten Son of God, Who Art Ever to me an Impregnable Protection, my Guard that never sleeps, my Defence that never fails: O Christ, Who in Heaven Art the Stay of the Angels, be now and for ever my Propitiator with the Father. O Mediator between God and man, I beseech Thee, through Thy Passion and the Redemption of Thy Life-Giving Cross, that when Thou shalt please to call me from this world, Thou wilt send the Angels of Peace to guard my soul and conduct it to the place of rest, and enable it to pass unscathed through the ranks of the rulers and powers of darkness. And, O Jesus Christ my Lord, may all who in that hour pray and plead for me find the ears of Thy Mercy open to their cries." [8th Century Royal Mercian Prayer Book; Prayer 14 of the Series of 23 Prayers]

https://www.bl.uk/eblj/2004articles/pdf/article1.pdf

http://www.bl.uk/manuscripts/FullDisplay.aspx?ref=Royal_MS_2_A_XX