We continue with the the next mishnah and its discussions in the gemara following the Pesach seder as it appears in the Talmud Meseches Pesachim 117-118 (from Sefaria.org The William Davidson digital edition of the Koren Noe Talmud Bavli):

The Birkhat HaMazon is very well known. We typically start with Pslam 126 (from Sefaria.org The Tanakh: The Holy Scriptures by JPS):

This is followed by a formulaic introduction to followed by the Grace after Meals (Birkhat HaMazon) from the Sefaria Pesach Haggadah with community translation found at Sefaria.org (abbreviated version presented):

After the third cup is drunk, the rest of Hallel is recited (Hallel is usually Psalms 113-118), but specific mention is made in the gemara of Psalm 136 which is also read during Pesuke D’zimra during the morning Shabbat service (from Sefaria.org The Tanakh: The Holy Scriptures by JPS):

The 26 verses allude to the name of Hashem (the gematria of the Hebrew letters spelled YHVH) and after eating, we praise Hashem for all that he has done for us. Not just redeeming us from Egypt, but in the future with the coming of Moshiach (May he speedily come!).