Ellicott's Commentary for English Readers - Exodus 12:29
(29) All the firstborn.—The Hebrew word used applies only to males.The firstborn of Pharaoh.—The law of primogeniture prevailed in Egypt, as elsewhere generally. The Pharaoh’s eldest son was recognised as “hereditary crown prince,” and sometimes associated in the kingdom during his father’s lifetime. This had been the case with Lameses II., probably the Pharaoh from whom Moses fled (Exodus 2:15); but the practice was not common. In any case, however, the eldest son of the reigning monarch... read more
Ellicott's Commentary for English Readers - Exodus 12:27
(27) It is the sacrifice of the Lord’s passover.—Heb., This is a passover-sacrifice to Jehovah. The emphatic word is “Passover;” and it was the meaning of this term which was especially to be explained. The explanation would involve an historical account of the circumstances of the institution, such as would be apt to call forth feelings of gratitude and devotion. read more