Where did Egypt's get its slave?

Answer 1

There were no slavery in Egypt. All Egyptians were devoting to the rulers and the religious leaders but not out of slavery. Even in building the pyramids, they were working on it only during the flooding periods where they were not working in cultivating their lands. After the flooding periods they go back to their own agriculture activities. Only during the Hyksos (الهكسوس) occupation, the kings at that time were afraid of Jews (as a race and not religion) in Egypt that they will have a prophet who will bring power to them. Accordingly, they started enmity to the Jews.
most came from Nubia...

Answer 2

There were no slavery in Egypt. All Egyptians were devoting to the rulers and the religious leaders but not out of slavery. Even in building the pyramids, they were working on it only during the flooding periods where they were not working in cultivating their lands. After the flooding periods they go back to their own agriculture activities. Only during the Hyksos (الهكسوس) occupation, the kings at that time were afraid of Jews (as a race and not religion) in Egypt that they will have a prophet who will bring power to them. Accordingly, they started enmity to the Jews.
most came from Nubia...

Answer 3

Ancient Egyptian slaves were usually war captives from the Middle East or indebted persons that were using the labor as an offset for the debt.