Divrey Hayamim Bais 30:1-2

Orthodox Jewish Bible

30 And Chizkiyah sent to kol Yisroel and Yehudah, and wrote iggerot also to Ephrayim and Menasheh, that they should come to the Beis Hashem at Yerushalayim, to keep the Pesach Hashem Elohei Yisroel.

² For HaMelech had conferred and agreed with his sarim, and kol HaKahal in Yerushalayim, to keep the Pesach in the second month.