וַיִּשְׁלַ֨ח יְחִזְקִיָּ֜הוּ עַל־כָּל־יִשְׂרָאֵ֣ל וִֽיהוּדָ֗ה וְגַֽם־אִגְּרוֹת֙ כָּתַב֙ עַל־אֶפְרַ֣יִם וּמְנַשֶּׁ֔ה לָב֥וֹא לְבֵית־יְהוָ֖ה בִּֽירוּשָׁלִָ֑ם לַעֲשׂ֣וֹת פֶּ֔סַח לַיהוָ֖ה אֱלֹהֵ֥י יִשְׂרָאֵֽל׃
Und Hiskia sandte nach ganz Israel und Juda und schrieb auch an Ephraim und Manasse Briefe, dass sie zum Haus des HERRN in Jerusalem kommen sollten, um das Passah für den HERRN, den Gott Israels, zu halten.
Mishnah Pesachim
Six things King Hezekiah did, concerning three they [the sages] agreed with him, and concerning three they did not agree with him: He dragged his father's bones [corpse] on a rope bier, and they agreed with him; He crushed the bronze serpent, and they agreed with him; He hid the book of remedies, and they agreed with him. And concerning three they did not agree with him: He cut down the doors of the Temple and sent them to the king of Assyria, and they did not agree with him; He closed up the waters of the Upper Gihon, and they did not agree with him; He intercalated [the month of] Nisan in Nisan, and they did not agree with him.