The Book of Jubilees, also known as 'Little Genesis' or 'Kufale', is a pseudepigraphal text of the Old Testament that rewrites the history of Genesis and part of Exodus, with emphasis on the division of time into jubilees and weeks of years. It is canonical only in the Ethiopian Orthodox Tewahedo Church and preserved entirely in Ge'ez. The book was originally written in Hebrew around the 2nd century BC and is cited by the Early Church Fathers.
Jubilees
Chapter 48
And in the sixth year of the third week of the forty-ninth jubilee, you departed and dwelt in the land of Midian, five weeks and one year. And you returned to Egypt in the second week, in the second year, of the fiftieth jubilee.
And you yourself know that He spoke with you on Mount Sinai, and what the prince Mastema wanted to do with you when you were returning to Egypt on the way, when you met him at the lodging.
Did he not seek with all his power to kill you and deliver the Egyptians from your hands when he saw that you were sent to execute judgment and vengeance on the Egyptians?
And I delivered you from his hands, and you did the signs and wonders which you were sent to do in Egypt against Pharaoh, and against all his house, and against his servants and his people.
And the Lord executed great vengeance upon them because of Israel, and smote them through blood and frogs, lice and flies, and malignant boils breaking out in wounds and their cattle by death, and by hailstones with which He destroyed everything that grew for them; and by locusts that devoured the residue left by the hail, and by darkness; and of the firstborn of men and of animals, and on all their idols He took vengeance and burned them with fire.
And everything was sent by your hands, so that you declared these things before they were done, and you spoke with the king of Egypt before all his servants and before his people.
And everything happened according to your words; ten great and terrible judgments came upon the land of Egypt, so that you executed vengeance against them for Israel.
And the Lord did everything because of Israel, and according to His commandment, which He had commanded Abraham that He would avenge them if they brought them by force into slavery.
And the prince Mastema rose up against you, and sought to deliver you into the hands of Pharaoh, and he always helped the Egyptian magicians, and they rose up and worked before you.
The wickedness we allowed them to work, but the remedies we did not allow to be made by their hands.
And the Lord smote them with malignant ulcers, and they were unable to stand, because we destroyed them and they could not perform even one sign.
And not enough all these signs and wonders was the prince Mastema ashamed, because he took courage and cried out to the Egyptians to pursue after you with all the powers of Egypt, with their chariots, and with their horses, and with all the armies of the peoples of Egypt.
And I stood between the Egyptians and Israel, and we delivered Israel from their hands, and out of the land of that people, and the Lord brought them into the midst of the sea as if on dry land.
And all the peoples whom we brought to pursue after Israel, the Lord our God cast them into the midst of the sea, into the depths of the abyss below the children of Israel, just as the people of Egypt had cast their children into the river. He took vengeance against 1,000,000 of them, and a thousand strong and energetic men were destroyed for each nursling of the children of your people whom they had cast 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 so that he could not accuse them.
And on the nineteenth day we let him go out so that he might help the Egyptians to pursue the children of Israel.
And he hardened their hearts and made them stubborn, and this device was created by the Lord our God so that He might strike the Egyptians and cast them into the sea.
And on the fourteenth day we bound him so that he could not accuse the children of Israel on the day when they asked the Egyptians for vessels and clothing, vessels of silver, vessels of gold, vessels of bronze, to despoil the Egyptians in exchange for the slavery in which they forced them to serve.
And we did not release the children of Israel from Egypt empty-handed.