Avraham blesses everything in the world, and this ability stems from Hashem's blessing of each of the avot with the attribute of kol (everything). We refer to these Divine blessings as ba-kol, mi-kol, kol, based on psukim (verses) that invoke these words in the context of each of the avot (Bava Batra 17a). Each of the avot are represented by each of the three shabbat meals on Shabbat--the day Hashem blesses as the day of the week which holds the blessing of shalom (peace). Shabbat Shalom.