Rabbi Yochanan said: "Whoever blesses over a full cup is granted an inheritance without boundaries, as it is stated: 'And of the fullness of Hashem's blessing, he shall take possession of the sea and the south'" (Deuteronomy 33:23). Rabbi Yosei bar Chanina said: "He is granted an inheritance and will inherit both this world and the world to come."
The World to Come - Whoever blesses over a full cup is
Ein Yaakov, Berakhot 7:19