Liturgy על פסחים 231:9

What differentiates this night from all [other] nights? On all [other] nights we eat chamets and matsa; this night, only matsa? On all [other] nights we eat other vegetables; tonight (only) marror. On all [other] nights, we don't dip [our food], even one time; tonight [we dip it] twice. On [all] other nights, we eat either sitting or reclining; tonight we all recline.