After completing Hallel, one says, "May all Your creations praise You," this is a blessing of song; it ends, "Praised are you Adonai, Sovereign acclaimed with songs of praise." One then recites the blessing for the fourth cup of wine. The leader of the Seder and everyone present reclines while drinking the wine. If one wishes to add a fifth cup, one may do so after reciting Hallel HaGadol (Psalm 136), which begins with Hodu la-adonai ki tov…hodu leilokei elokim. There are twenty six passages in this psalm equal to the twenty six generations that had not yet receive the Torah before it was given to the people of Israel. Despite this, God in His great mercy, continued to sustain these generations. One then recites Nishmat Kol Hai though the blessing at the end of Yishtabah; so says HaRitz Giat. Rabbi Hayim Kohen suggests that one should not say the blessing at the end of Hallel since it is sufficient for there to be a blessing at the end of Yishtabah. It is not necessary to conclude the passages of song and praise twice. This is also the opinion expressed in the Prayer book of Saadia Gaon.