It is not written "to give to you," but "to give to them (your forefathers)" — whence we see (proof of) the resurrection in the Torah.
"as the days of the heavens upon the earth": The faces of the righteous will (then) shine as the day (i.e., the sun). And thus is it written (Judges 5:31) "and His lovers, like the sun emerging in its strength." (Psalms 16:11) "… with seven joys, Your face": With seven joys the faces of the righteous are destined to receive the Face of the Shechinah in the world to come: [1] "His lovers like the sun emerging in its strength", [2] (Song of Songs 6:10) "fair as the moon", [3] (Daniel 12:3) "and the wise ones will shine as the brightness of the firmament", [4] "and they that turn the many to righteousness (will shine) as the stars forever", [5] (Nachum 2:4) "and like lightnings shall they run", [6] (Psalms 45:1) "To the chief musician upon shoshanim (the righteous, whose faces are like shoshanim (lilies)", [7] (Hoshea 14:7) "and his beauty will be as that of the olive tree."