 The "love" of God that urges finds reflection in the characterization of God as the "Beloved" in the Lekhah Dodi liturgical poem of the Kabbalat Shabbat prayer service.And the "leshem yihud" prayer before putting on tefillin quotes the commandment of 

In the "magid" section, the Haggadah combines and in the first answer to the Four Questions ("Ma Nishtana") in the "magid" section of the Seder.And shortly thereafter, the Haggadah quotes to provide the question of the wise son, also in the "magid" section.