Joshua 24:5

And I plagued Egypt, according to that which I did among them. This verse implies that the Israelites possessed some authentic record which rendered it unnecessary to enter into detail. Add to this the fact that this speech is ascribed to Joshua, and that the historian, as we have seen, had access to authentic sources of information, and we cannot avoid the conclusion that the hypothesis of the existence of the written law of Moses at the time of the death of Joshua has a very high degree of probability. The word rendered "plagued" is literally smote, but usually with the idea of a visitation from God. And afterward I brought you out. The absence of any mention of the plagues here is noteworthy. It cannot be accounted for on the supposition that our author was ignorant of them, for we have ample proof that the Book of Joshua was compiled subsequently to the Pentateuch. This is demonstrated by the quotations, too numerous to specify here, which have been noticed in their place. We can only, therefore, regard the omission made simply for the sake of brevity, and because they were so well known to all, as a sign of that tendency, noticed under verse 1, to abstain from that amplification of marvels common to all mythical histories. Had Joshua desired to indulge a poetic imagination, an admirable opportunity was here afforded him.