Angele Dei, also know as the Prayer to One's Guardian Angel, was in the past attributed to St. Anselm (c1033-1109), for it appears in medieval collections of St. Anselm's works. However, it is clear that this prayer was added to Anselm's works sometime after his death. As best can be determined, this prayer is an interpolation of Reginald of Canterbury's (d. c 1109) Life of St. Malchus. St. Malchus (d. c 390) was a famous hermit who was a friend of St. Jerome (c 341-420). The popular English translation given below is from the later half of the 19th century and appears in the Baltimore Manual of Prayers (1888).
Guardian Angels protect their charges against the assaults of demons to preserve them from sin. Several passages in Scripture mention them in passing. (Dn 10: 13,20-21, Tob 12:12, Mt 18:10, Acts 12:11,15). October 2 is the memorial to the Guardian Angels. This prayer carries a partial indulgence.
| ANGELE DEI,
qui custos es mei,
Me tibi commissum pietate superna;
(Hodie, Hac nocte) illumina, custodi, rege, et guberna.
| ANGEL OF GOD,
my guardian dear,
To whom his love commits me here;
Ever this (day, night) be at my side,
To light and guard, to rule and guide.