The Book of Jubilees 

Chapter 48 

1 And in the sixth year of the third week of the forty-ninth jubilee thou didst depart and dwell (in the land of Midian), five weeks and one year. And thou didst return into Egypt in the second week 2 in the second year in the fiftieth jubilee. And thou thyself knowest what He spake unto thee on Mount Sinai, and what prince Mastema desired to do with thee when thou wast returning into Egypt 3 on the way when thou didst meet him at the lodging-place. Did he not with all his power seek to slay thee and deliver the Egyptians out of thy hand when he saw that thou wast sent to execute 4 judgment and vengeance on the Egyptians? And I delivered thee out of his hand, and thou didst perform the signs and wonders which thou wast sent to perform in Egypt against Pharaoh, and 5 against all his house, and against his servants and his people. And the Lord executed a great vengeance on them for Israel's sake, and smote them through (the plagues of) blood and frogs, lice and dog-flies, and malignant boils breaking forth in blains; and their cattle by death; and by hail-stones, thereby He destroyed everything that grew for them; and by locusts which devoured the residue which had been left by the hail, and by darkness; and (by the death) of the first-born of 6 men and animals, and on all their idols the Lord took vengeance and burned them with fire And everything was sent through thy hand, that thou shouldst declare (these things) before they were done, and thou didst speak with the king of Egypt before all his servants and before his people 7 And everything took place according to thy words; ten great and terrible judgments came on the 8 land of Egypt that thou mightest execute vengeance on it for Israel. And the Lord did everything for Israel's sake, and according to His covenant, which he had ordained with Abraham that He 9 would take vengeance on them as they had brought them by force into bondage. And the prince Mastema stood up against thee, and sought to cast thee into the hands of Pharaoh, and he helped 10 the Egyptian sorcerers, and they stood up and wrought before thee the evils indeed we permitted 11 them to work, but the remedies we did not allow to be wrought by their hands. And the Lord smote them with malignant ulcers, and they were not able to stand, for we destroyed them so that 12 they could not perform a single sign. And notwithstanding all (these) signs and wonders the prince Mastema was not put to shame because he took courage and cried to the Egyptians to pursue after thee with all the powers of the Egyptians, with their chariots, and with their horses, and with all the 13 hosts of the peoples of Egypt. And I stood between the Egyptians and Israel, and we delivered Israel out of his hand, and out of the hand of his people, and the Lord brought them through the 14 midst of the sea as if it were dry land. And all the peoples whom he brought to pursue after Israel, the Lord our God cast them into the midst of the sea, into the depths of the abyss beneath the children of Israel, even as the people of Egypt had cast their children into the river He took vengeance on 1,000,000 of them, and one thousand strong and energetic men were destroyed on 15 account of one suckling of the children of thy people which they had thrown into the river. And on the fourteenth day and on the fifteenth and on the sixteenth and on the seventeenth and on the eighteenth the prince Mastema was bound and imprisoned behind the children of Israel that he 16 might not accuse them. And on the nineteenth we let them loose that they might help the 17 Egyptians and pursue the children of Israel. And he hardened their hearts and made them stubborn, and the device was devised by the Lord our God that He might smite the Egyptians and 18 cast them into the sea. And on the fourteenth we bound him that he might not accuse the children of Israel on the day when they asked the Egyptians for vessels and garments, vessels of silver, and vessels of gold, and vessels of bronze, in order to despoil the Egyptians in return for the bondage in 19 which they had forced them to serve. And we did not lead forth the children of Israel from Egypt empty handed.