We drink four cups of wine during the Seder.

Each corresponds to one of the four ways in which the Bible says that God promised us that we would be freed from slavery and brought back to the land of our ancestors:

1. "I will take you out…"

2. "I will deliver you…"

3. "I will redeem you…"

4. "I will take you as a nation…"

haggadah Section: -- Cup #2 & Dayenu
Source: Traditional