Rashi on Deuteronomy 1:8/רש"י על דברים א׳:ח׳

1ראה נתתי SEE, I HAVE GIVEN [THE LAND BEFORE THEE] — With your own eyes do you see this: I do not tell you this by conjecture or hearsay (Sifrei Devarim 7).

2באו ורשו GO IN AND POSSESS [THE LAND] — There is no one who will contest the matter, and you will not need to wage war. Indeed, had they not sent the spies, but had trusted in God's promise, they would not have needed weapons of war (cf. Sifrei Devarim 7).

3לאבתיכם [THE LAND WHICH THE LORD SWARE] UNTO YOUR FATHERS … [TO GIVE TO THEM] — Why does he further mention their names: to Abraham, to Isaac, and to Jacob? But it is to suggest the following: The merit of Abraham would itself suffice, that of Isaac would itself suffice, that of Jacob would itself suffice, that I should give the land to you (cf. Sifrei Devarim 8:1; see also Rashi on Leviticus 26:42).