Psalms 78:49

“He cast upon them the fierceness of his anger, etc.] This with the following words, wrath, and indignation, and trouble, are thought by some to intend the other plagues, which are not particularly mentioned; or rather they express the manner in which they were all inflicted, in great wrath and hot displeasure for their sins and iniquities, and which particularly were shown by sending evil angels among them; not evil in themselves, but because they were the instruments God made use of to bring evil things upon the Egyptians, as good angels often are; though some think that demons, devils, or wicked spirits, were sent among them at that time; the darkness was over all the land, and frightened…”

“He cast upon them the fierceness of his anger ... - This verse is designed to describe the last, and the most dreadful of the plagues that came upon the Egyptians, the slaying of their first-born; and hence, there is such an accumulation of expressions: anger - fierce anger - wrath - indignation - trouble. All these expressions are designed to be emphatic; all these things were combined when the first-born were slain. There was no form of affliction that could surpass this; and in this trial all the expressions of the divine displeasure seemed to be exhausted. It was meant that this should be the last of the plagues; it was meant that the nation should be humbled, and should be made willing…”

“Evil angels - Whom God employed in producing these plagues. Psalms 78:51”

“cast: Psa 11:6; Job 20:23; Isa 42:25; Lam 4:11; Zep 3:8; Rom 2:8, Rom 2:9 by sending: Kg1 22:21, Kg1 22:22; Job 1:12, Job 2:6, Job 2:7 Psalms 78:50”

“When these plagues rose to the highest pitch, Israel became free, and removed, being led by its God, into the Land of Promise; but it continued still to behave there just as it had done in the desert. The poet in Psa 78:49-51 brings the fifth Egyptian plague, the pestilence ( Exo 9:1-7), and the tenth and last, the smiting of the first-born (מכּת בּכרות), Exo 11:1, together. Psa 78:49 sounds like Job 20:23 (cf. below Psa 78:64). מלאכי רעים are not wicked angels, against which view Hengstenberg refers to the scriptural thesis of Jacobus Ode in his work De Angelis, Deum ad puniendos malos homines mittere bonos angelos et ad castigandos pios usurpare malos, but angels that bring misfortune. The…”