Halakhah su Salmi 22:4

In honor of [reading] the Megillah you should wear Shabbos clothes in the evening, and when returning from the synagogue, you should find the house brightly lit, the table set, and the beds made. In the evening, after the Shemoneh Esrei, the Full Kaddish with Tiskabbeil is said, then the Megillah is read. After that, Ve'ata kadosh etc. is said. (This verse is found in Psalm 22:4, "For the Conductor; on the ayeles hashachar," which refers to Esther. It is said (verse 3), "My God, I call…" etc. which refers to the reading of the Megillah. Rabbi Yehoshua ben Levi said, Every man must read the Megillah at night and repeat it in the daytime, for it is said, "My God, I call by day, but you do not answer, and at night I am not silent." This is followed by [the verse], "You are the Holy One" etc.). After that, the Full Kaddish, is said, omitting Tiskabbeil. If it is Shabbos night [we say], Vihi no'am, Ve'ata kadosh, the Full Kaddish omitting Tiskabbeil, Veyiten lecha; and we say Havdalah over a cup of wine, [and conclude with] Aleinu.