What does Exodus 12:24 mean?

An earlier command told Israel that they would commemorate the first Passover for the rest of history (Exodus 12:14). That concept is repeated here. The Hebrew people are instructed to remember their liberation from Egypt by following the rites and traditions established on that first Passover night (Exodus 12:5–6, 17–20). It is also important that Israel clearly explain the meaning of these traditions. Each generation must know what happened and why it is being remembered through the various symbols.

"Sons" represent the future life of the Israelite people. Both symbolically and literally, they were the means by which the prior generation could establish a legacy. The Lord is giving His people instructions on teaching their sons. Meanwhile, the impending tenth plague (Exodus 11:4–6) will deprive Egypt of their firstborn.