George Haydock's Catholic Commentary
Psalms 77:49
Angels. Hebrew, "messengers of evil," (Tirinus) as the Septuagint may also signify the good angels. (Amama) --- He ordered Moses and Aaron to denounce his judgments, which he executed either by the devils, (Origen; Worthington) or by the blessed spirits. (St. Ambrose; Exodus xii. 29., and Wisdom xviii. 14.) --- Hence from the effect, (Bellarmine) they may have the appellation of evil. (Theodoret) (Calmet) --- The other plagues are thus briefly mentioned. (Menochius) (Worthington)