Reference for Pesachim 230:6

אמר רבא בלע מצה יצא בלע מרור לא יצא בלע מצה ומרור ידי מצה יצא ידי מרור לא יצא כרכן בסיב ובלען אף ידי מצה נמי לא יצא

it was stated here? Then why must he wash his hands twice: surely he has [already] washed his hands once? - I will tell you: since he is to recite the Haggadah<span class="x" onmousemove="('comment',' The narrative of the exodus, which is an essential part of the ritual.');">¹⁰</span> and Hallel,<span class="x" onmousemove="('comment',' 'Praise,' i.e., Ps. CXIII-CXVIII.');">¹¹</span>

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