What does Exodus 8:26 mean?
Moses rejects Pharaoh's offer for the Israelites to worship the Lord without leaving the Goshen territory. Israel settled there when they first came into Egypt (Genesis 45:10). Pharaoh has resisted commands to release the Hebrews (Exodus 5:1–4) despite multiple plagues (Exodus 3:19–20). Moses' first objection is that this is not what God wants (Exodus 8:27)—it would be wrong to accept anything less than total obedience.Second, while Goshen is somewhat separate from other Egyptian regions, it is not entirely distinct. Israel settled in Goshen because some of their cultural practices were deeply offensive to Egyptians (Exodus 46:34). It's entirely possible that the nation had not offered animal sacrifices for the entire time they were enslaved. If the Jews were to begin conducting major sacrifices, those disagreements could bring violent reactions. Israel is already under brutal oppression (Exodus 1:11–14). Nothing good will come of antagonizing the Egyptian population.
Scholars offer several explanations of why Jewish offerings would be so offensive to Egyptians. Cows and bulls were worshiped in Egypt. Hathor, an Egyptian goddess, and Apis, a bull and supposed incarnation of the god Ptah, were especially revered. If the Israelites killed cattle so close to Egyptian populations, it would result in outrage. Similar suggestions exist regarding goats. For one reason or another, Egyptians considered the entire concept of shepherding to be distasteful. It's likely sheep sacrifices would also fall under this same opinion.
Earlier passages indicate that Aaron was the one to physically speak these words, after receiving them from Moses (Exodus 7:2).