Exodus 10:2

“And that thou mayest tell in the ears of thy son, and of thy son’s son, etc.] Not of his sons and grandsons only; for Moses here, as Aben Ezra observes, was in the stead of Israel; and the sense is, that it should be told to their posterity in all succeeding ages: what things I have wrought in Egypt; the plagues that he inflicted on the Egyptians: and my signs which I have done amongst them; meaning the same things which were signs: that ye may know how that I am the Lord; that their God is the true Jehovah, and the one only living and true God; the Lord God omnipotent, omniscient, omnipresent, infinite, and eternal.”

“And that thou mayest tell . . . of thy son, and of thy son's son, &c.--There was a further and higher reason for the infliction of those awful judgments, namely, that the knowledge of them there, and the permanent record of them still, might furnish a salutary and impressive lesson to the Church down to the latest ages. Worldly historians might have described them as extraordinary occurrences that marked this era of Moses in ancient Egypt. But we are taught to trace them to their cause: the judgments of divine wrath on a grossly idolatrous king and nation.”

“10:2 The plagues were sent so that Israel will know that I am the Lord (similarly, with respect to Egypt, see 9:14-16).”

“And that: Exo 13:8, Exo 13:9, Exo 13:14; Deu 4:9, Deu 6:20-22; Psa 44:1, Psa 71:18, Psa 78:5, Psa 78:6; Joe 1:3; Eph 6:4 that ye: Exo 7:17; Psa 58:11; Eze 20:26, Eze 20:28 Exodus 10:3”