You mean when Moses was dueling with the Pharaohs magicians? The plagues fell only on the Egyptians not the Israelites. Part of the point of it all was that God protected His people from the plagues so egypt could see how powerful He was. Only the final one, the angel of death, would effect ANY family who didnt follow the directions God gave. Israelites did as told tho so only Egyptian families were effected there as well.
Neither- the "plagues" of Egypt never actually happened. Even theist historians will admit that the "Exodus" story is fiction, and meant to be metaphorical. The Egyptians never held slaves until after their occupation by the Greeks, and the Hebrew people were never in Egypt en masse. At the time the Exodus tale supposedly took place, the Hebrews were still a part of the Canaanite tribes in the desert. Interestingly, most of what the Hebrews considered plagues wouldn't have even bothered the Egyptians! In fact, several of them would have been seen as blessings of their gods. Frogs, for example, were considered extremely lucky to have in one's house during the flooding of the Nile plain, as it represented a good crop that year and a blessing of Heket, the goddess of fertility and agriculture (frog goddess, incidentally). Similarly, locusts were seen as one of the earthly incarnations of the pharaoh's ka, or spirit. The Nile also frequently became red due to silt downflow during the flood season.
Both the Egyptians and the Israelites experienced the first three plagues: 1- Nile river turned to blood (Exodus 7:20, 21), 2- the Nile river brought forth frogs (Exodus 8:3), 3- gnats in all the land of Egypt (Exodus 8:16),
However in Exodus 8:23 we read, "And I shall indeed set a demarcation between my people and your people. Tomorrow this sign will take place." Here we see how God identifies that the from the fourth plague onward only the Egyptians would be affected. We see this fulfilled in Exodus 9:6: "Accordingly Jehovah did this thing on the next day, and all sorts of livestock of Egypt began to die; but not one of the livestock of the sons of Israel died."
The rest of the plagues that affected only Egyptians were: 4- Egypt filled with gadflies (Ex. 8:21). 5- plague on the animals; many of the cattle, sheep and goats of the Egyptians died (Ex. 9:6) 6- bad sores on people and animals (Ex. 9:10) 7- thunder and hailstorm (Ex. 9:23) 8- swarms of locusts (Ex.10:13, 14) 9- three days of dense darkness for the Egyptian, however the Israelites still had daylight (Ex. 10:22, 23) 10- death of the first-born sons of the Egyptians men and animals (Ex. 11:5)
22 But on that day I will set apart the land of Goshen, where my people dwell, so that no swarms of flies shall be there, that you may know that I am the Lord in the midst of the earth. 5 23 Thus I will put a division between my people and your people. All the livestock of the Egyptians died, but not one of the livestock of the people of Israel died. Only in the land of Goshen, where the people of Israel were, was there no hail.