Wisdom of Solomon 16:9
7 For the one who turned toward it was saved, not by the thing that was beheld, but by you, the Savior of all. 8 And by this also you convinced our enemies that it is you who deliver from every evil. 9 For they were killed by the bites of locusts and flies, and no healing was found for them, because they deserved to be punished by such things. 10 But your children were not conquered even by the fangs of venomous serpents, for your mercy came to their help and healed them. 11 To remind them of your oracles they were bitten, and then were quickly delivered, so that they would not fall into deep forgetfulness and become unresponsive to your kindness.
Josephus Antiquities of the Jews Book 2 14:3
3 A third plague soon followed: hordes of lice sprang from the Egyptians’ own bodies, and because of their wickedness, they were past any remedy of ointments or washing. Pharaoh, fearful of his people’s downfall, once more granted the Hebrews permission to go. But when the plague ended, he demanded they leave their wives and children behind, provoking God further, as if the Almighty could be deceived. Consequently, Egypt was infested with swarms of new pestilential creatures not seen before, destroying people and farmland alike. Anything spared by the creatures fell to a deadly disease that struck humans too.
Notes and References
"... in Josephus' account Moses goes to Pharaoh alone after he is assured of the allegiance of the Israelites, of their agreement to follow his orders, and of their love of liberty. Again, it is Moses rather than Aaron (Exodus 7:10) who performs miracles with his rod in the presence of Pharaoh; and Moses' role is all the more impressive because, according to Josephus' addition, the king had ridiculed him. Again, whereas Exodus 7:19 says that it was Aaron who with his staff produced the plague of blood, Josephus, though he generally avoids attributing miracles to God, says that the plague was produced at God's command and does not indicate who actually performed it. Likewise, in Exodus 8:2, 13 it is Aaron who brought on the plagues of frogs and lice, whereas Josephus declares that it was God who produced them ..."
Feldman, Louis H. Josephus' Portrait of Moses (pp. 285-328) The Jewish Quarterly Review, LXXXII, Nos. 3-4, 1992