(6:4) I also made My covenant with them—the patriarchs— promising to give them the land of Canaan, the land of their sojourning, where they lived as foreigners.
promising to give them R. Simai says: Where do we find an allusion to the resurrection of the dead in the Written Torah? For it says “I also made My covenant with them—the patriarchs— promising to give them the land of Canaan.” In this verse, God speaks to Moses, describing to him the covenant He made with the patriarchs Abraham, Isaac, and Jacob to give them the land of Canaan. Note that it does not say “to give you—the children of Israel” but rather “to give them—the patriarchs.” The implication is that the patriarchs themselves are to inherit the land of Canaan. Because they had already died, the promise can only be fulfilled in the future when the patriarchs will be resurrected. Here, we have an allusion in the Torah to the resurrection of the dead (Sanhedrin 90b).
(6:6, 7) Therefore say to the Israelites in My name, “I am God. I will take you away from your forced labor in Egypt and free you from their slavery. I will liberate you with a demonstration of My power, and with great acts of judgment. I will take you to Myself as a … nation.”