At the end of the festive meal, Birkat HaMazon (Grace After Meals–also known by the Yiddish term Bentching) is recited to thank G-d for the food and sustenance that has been enjoyed. This is followed immediately by a second recitation of the Sheva Brachot (Seven Blessings) repeating the same blessings that had been recited under the chuppah.
There are two cups of wine involved in the formal Birkat HaMazon. The first cup of wine is held by the one who leads the Birkat HaMazon, and after the Grace has concluded, the second cup is passed around to the individuals who are honored with reciting six of the seven Sheva Brachot. The leader then recites the blessing over the wine, the seventh blessing. After the seven blessings are completed, the two cups of wine are blended together and divided among the bride, groom and leader to drink.