Dayeinu - It would have been enough
One of the best known poems from the haggdah that is read at the Seder on Passover is Dayeinu - It would have been enough. This is possibly one of the oldest known Jewish poems and one of the most powerful about the many miracles and favors G-d did to us over the Exodus. All about the poem Dayeinu, where it came from and it's deeper hidden meanings.