the Lord smote: The infliction of this judgment on the Egyptians was most equitable; because, after their nation had been preserved by one of the Israelitish family, they had, contrary to all right, and in defiance of original stipulation, enslaved the people to whom they had been so much indebted, had murdered their offspring, and made their bondage intolerable. See Bryant, p. 160. Num 3:13, Num 8:17, Num 33:4; Psa 78:51, Psa 105:36, Psa 135:8, Psa 136:10; Heb 11:28; Heb 12:23
the firstborn of Pharaoh: Exo 4:23, Exo 11:5
dungeon: Heb. house of the pit, Isa 24:22, Isa 51:14; Jer 38:6, Jer 38:13; Zec 9:11